# Container Analysis API . projects . notes . occurrences

## Instance Methods

Lists occurrences referencing the specified note. Provider projects can use

Retrieves the next page of results.

### Method Details

`list(name, pageToken=None, pageSize=None, filter=None, x__xgafv=None)`

    Lists occurrences referencing the specified note. Provider projects can use
    this method to get all occurrences across consumer projects referencing the
    specified note.

    Args:
      name: string, Required. The name of the note to list occurrences for in the form of
    `projects/[PROVIDER_ID]/notes/[NOTE_ID]`. (required)
      pageToken: string, Token to provide to skip to a particular spot in the list.
      pageSize: integer, Number of occurrences to return in the list.
      filter: string, The filter expression.
      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # Response for listing occurrences for a note.
        "occurrences": [ # The occurrences attached to the specified note.
          { # An instance of an analysis type that has been found on a resource.
            "kind": "A String", # Output only. This explicitly denotes which of the occurrence details are
                # specified. This field can be used as a filter in list requests.
            "resource": { # An entity that can have metadata. For example, a Docker image. # Required. Immutable. The resource for which the occurrence applies.
              "name": "A String", # Deprecated, do not use. Use uri instead.
                  #
                  # The name of the resource. For example, the name of a Docker image -
                  # "Debian".
              "contentHash": { # Container message for hash values. # Deprecated, do not use. Use uri instead.
                  #
                  # The hash of the resource content. For example, the Docker digest.
                "type": "A String", # Required. The type of hash that was performed.
                "value": "A String", # Required. The hash value.
              },
              "uri": "A String", # Required. The unique URI of the resource. For example,
                  # `https://gcr.io/project/image@sha256:foo` for a Docker image.
            },
            "attestation": { # Details of an attestation occurrence. # Describes an attestation of an artifact.
              "attestation": { # Occurrence that represents a single "attestation". The authenticity of an # Required. Attestation for the resource.
                  # attestation can be verified using the attached signature. If the verifier
                  # trusts the public key of the signer, then verifying the signature is
                  # sufficient to establish trust. In this circumstance, the authority to which
                  # this attestation is attached is primarily useful for look-up (how to find
                  # this attestation if you already know the authority and artifact to be
                  # verified) and intent (which authority was this attestation intended to sign
                  # for).
                "pgpSignedAttestation": { # An attestation wrapper with a PGP-compatible signature. This message only # A PGP signed attestation.
                    # supports `ATTACHED` signatures, where the payload that is signed is included
                    # alongside the signature itself in the same file.
                  "contentType": "A String", # Type (for example schema) of the attestation payload that was signed.
                      # The verifier must ensure that the provided type is one that the verifier
                      # supports, and that the attestation payload is a valid instantiation of that
                      # type (for example by validating a JSON schema).
                  "signature": "A String", # Required. The raw content of the signature, as output by GNU Privacy Guard
                      # (GPG) or equivalent. Since this message only supports attached signatures,
                      # the payload that was signed must be attached. While the signature format
                      # supported is dependent on the verification implementation, currently only
                      # ASCII-armored (`--armor` to gpg), non-clearsigned (`--sign` rather than
                      # `--clearsign` to gpg) are supported. Concretely, `gpg --sign --armor
                      # --output=signature.gpg payload.json` will create the signature content
                      # expected in this field in `signature.gpg` for the `payload.json`
                      # attestation payload.
                  "pgpKeyId": "A String", # The cryptographic fingerprint of the key used to generate the signature,
                      # as output by, e.g. `gpg --list-keys`. This should be the version 4, full
                      # 160-bit fingerprint, expressed as a 40 character hexidecimal string. See
                      # https://tools.ietf.org/html/rfc4880#section-12.2 for details.
                      # Implementations may choose to acknowledge "LONG", "SHORT", or other
                      # abbreviated key IDs, but only the full fingerprint is guaranteed to work.
                      # In gpg, the full fingerprint can be retrieved from the `fpr` field
                      # returned when calling --list-keys with --with-colons.  For example:
                      # ```
                      # gpg --with-colons --with-fingerprint --force-v4-certs \
                      #     --list-keys attester@example.com
                      # tru::1:1513631572:0:3:1:5
                      # pub:...<SNIP>...
                      # fpr:::::::::24FF6481B76AC91E66A00AC657A93A81EF3AE6FB:
                      # ```
                      # Above, the fingerprint is `24FF6481B76AC91E66A00AC657A93A81EF3AE6FB`.
                },
                "genericSignedAttestation": { # An attestation wrapper that uses the Grafeas `Signature` message.
                    # This attestation must define the `serialized_payload` that the `signatures`
                    # verify and any metadata necessary to interpret that plaintext.  The
                    # signatures should always be over the `serialized_payload` bytestring.
                  "contentType": "A String", # Type (for example schema) of the attestation payload that was signed.
                      # The verifier must ensure that the provided type is one that the verifier
                      # supports, and that the attestation payload is a valid instantiation of that
                      # type (for example by validating a JSON schema).
                  "signatures": [ # One or more signatures over `serialized_payload`.  Verifier implementations
                      # should consider this attestation message verified if at least one
                      # `signature` verifies `serialized_payload`.  See `Signature` in common.proto
                      # for more details on signature structure and verification.
                    { # Verifiers (e.g. Kritis implementations) MUST verify signatures
                        # with respect to the trust anchors defined in policy (e.g. a Kritis policy).
                        # Typically this means that the verifier has been configured with a map from
                        # `public_key_id` to public key material (and any required parameters, e.g.
                        # signing algorithm).
                        #
                        # In particular, verification implementations MUST NOT treat the signature
                        # `public_key_id` as anything more than a key lookup hint. The `public_key_id`
                        # DOES NOT validate or authenticate a public key; it only provides a mechanism
                        # for quickly selecting a public key ALREADY CONFIGURED on the verifier through
                        # a trusted channel. Verification implementations MUST reject signatures in any
                        # of the following circumstances:
                        #   * The `public_key_id` is not recognized by the verifier.
                        #   * The public key that `public_key_id` refers to does not verify the
                        #     signature with respect to the payload.
                        #
                        # The `signature` contents SHOULD NOT be "attached" (where the payload is
                        # included with the serialized `signature` bytes). Verifiers MUST ignore any
                        # "attached" payload and only verify signatures with respect to explicitly
                        # provided payload (e.g. a `payload` field on the proto message that holds
                        # this Signature, or the canonical serialization of the proto message that
                        # holds this signature).
                      "publicKeyId": "A String", # The identifier for the public key that verifies this signature.
                          #   * The `public_key_id` is required.
                          #   * The `public_key_id` MUST be an RFC3986 conformant URI.
                          #   * When possible, the `public_key_id` SHOULD be an immutable reference,
                          #     such as a cryptographic digest.
                          #
                          # Examples of valid `public_key_id`s:
                          #
                          # OpenPGP V4 public key fingerprint:
                          #   * "openpgp4fpr:74FAF3B861BDA0870C7B6DEF607E48D2A663AEEA"
                          # See https://www.iana.org/assignments/uri-schemes/prov/openpgp4fpr for more
                          # details on this scheme.
                          #
                          # RFC6920 digest-named SubjectPublicKeyInfo (digest of the DER
                          # serialization):
                          #   * "ni:///sha-256;cD9o9Cq6LG3jD0iKXqEi_vdjJGecm_iXkbqVoScViaU"
                          #   * "nih:///sha-256;703f68f42aba2c6de30f488a5ea122fef76324679c9bf89791ba95a1271589a5"
                      "signature": "A String", # The content of the signature, an opaque bytestring.
                          # The payload that this signature verifies MUST be unambiguously provided
                          # with the Signature during verification. A wrapper message might provide
                          # the payload explicitly. Alternatively, a message might have a canonical
                          # serialization that can always be unambiguously computed to derive the
                          # payload.
                    },
                  ],
                  "serializedPayload": "A String", # The serialized payload that is verified by one or more `signatures`.
                      # The encoding and semantic meaning of this payload must match what is set in
                      # `content_type`.
                },
              },
            },
            "name": "A String", # Output only. The name of the occurrence in the form of
                # `projects/[PROJECT_ID]/occurrences/[OCCURRENCE_ID]`.
            "vulnerability": { # Details of a vulnerability Occurrence. # Describes a security vulnerability.
              "longDescription": "A String", # Output only. A detailed description of this vulnerability.
              "shortDescription": "A String", # Output only. A one sentence description of this vulnerability.
              "effectiveSeverity": "A String", # The distro assigned severity for this vulnerability when it is
                  # available, and note provider assigned severity when distro has not yet
                  # assigned a severity for this vulnerability.
              "severity": "A String", # Output only. The note provider assigned Severity of the vulnerability.
              "cvssScore": 3.14, # Output only. The CVSS score of this vulnerability. CVSS score is on a
                  # scale of 0-10 where 0 indicates low severity and 10 indicates high
                  # severity.
              "relatedUrls": [ # Output only. URLs related to this vulnerability.
                { # Metadata for any related URL information.
                  "url": "A String", # Specific URL associated with the resource.
                  "label": "A String", # Label to describe usage of the URL.
                },
              ],
              "type": "A String", # The type of package; whether native or non native(ruby gems, node.js
                  # packages etc)
              "packageIssue": [ # Required. The set of affected locations and their fixes (if available)
                  # within the associated resource.
                { # This message wraps a location affected by a vulnerability and its
                    # associated fix (if one is available).
                  "severityName": "A String", # Deprecated, use Details.effective_severity instead
                      # The severity (e.g., distro assigned severity) for this vulnerability.
                  "affectedLocation": { # The location of the vulnerability. # Required. The location of the vulnerability.
                    "package": "A String", # Required. The package being described.
                    "version": { # Version contains structured information about the version of a package. # Required. The version of the package being described.
                      "revision": "A String", # The iteration of the package build from the above version.
                      "name": "A String", # Required only when version kind is NORMAL. The main part of the version
                          # name.
                      "kind": "A String", # Required. Distinguishes between sentinel MIN/MAX versions and normal
                          # versions.
                      "epoch": 42, # Used to correct mistakes in the version numbering scheme.
                    },
                    "cpeUri": "A String", # Required. The CPE URI in [cpe format](https://cpe.mitre.org/specification/)
                        # format. Examples include distro or storage location for vulnerable jar.
                  },
                  "fixedLocation": { # The location of the vulnerability. # The location of the available fix for vulnerability.
                    "package": "A String", # Required. The package being described.
                    "version": { # Version contains structured information about the version of a package. # Required. The version of the package being described.
                      "revision": "A String", # The iteration of the package build from the above version.
                      "name": "A String", # Required only when version kind is NORMAL. The main part of the version
                          # name.
                      "kind": "A String", # Required. Distinguishes between sentinel MIN/MAX versions and normal
                          # versions.
                      "epoch": 42, # Used to correct mistakes in the version numbering scheme.
                    },
                    "cpeUri": "A String", # Required. The CPE URI in [cpe format](https://cpe.mitre.org/specification/)
                        # format. Examples include distro or storage location for vulnerable jar.
                  },
                },
              ],
            },
            "installation": { # Details of a package occurrence. # Describes the installation of a package on the linked resource.
              "installation": { # This represents how a particular software package may be installed on a # Required. Where the package was installed.
                  # system.
                "location": [ # Required. All of the places within the filesystem versions of this package
                    # have been found.
                  { # An occurrence of a particular package installation found within a system's
                      # filesystem. E.g., glibc was found in `/var/lib/dpkg/status`.
                    "cpeUri": "A String", # Required. The CPE URI in [CPE format](https://cpe.mitre.org/specification/)
                        # denoting the package manager version distributing a package.
                    "version": { # Version contains structured information about the version of a package. # The version installed at this location.
                      "revision": "A String", # The iteration of the package build from the above version.
                      "name": "A String", # Required only when version kind is NORMAL. The main part of the version
                          # name.
                      "kind": "A String", # Required. Distinguishes between sentinel MIN/MAX versions and normal
                          # versions.
                      "epoch": 42, # Used to correct mistakes in the version numbering scheme.
                    },
                    "path": "A String", # The path from which we gathered that this package/version is installed.
                  },
                ],
                "name": "A String", # Output only. The name of the installed package.
              },
            },
            "build": { # Details of a build occurrence. # Describes a verifiable build.
              "provenanceBytes": "A String", # Serialized JSON representation of the provenance, used in generating the
                  # build signature in the corresponding build note. After verifying the
                  # signature, `provenance_bytes` can be unmarshalled and compared to the
                  # provenance to confirm that it is unchanged. A base64-encoded string
                  # representation of the provenance bytes is used for the signature in order
                  # to interoperate with openssl which expects this format for signature
                  # verification.
                  #
                  # The serialized form is captured both to avoid ambiguity in how the
                  # provenance is marshalled to json as well to prevent incompatibilities with
                  # future changes.
              "provenance": { # Provenance of a build. Contains all information needed to verify the full # Required. The actual provenance for the build.
                  # details about the build from source to completion.
                "endTime": "A String", # Time at which execution of the build was finished.
                "startTime": "A String", # Time at which execution of the build was started.
                "triggerId": "A String", # Trigger identifier if the build was triggered automatically; empty if not.
                "sourceProvenance": { # Source describes the location of the source used for the build. # Details of the Source input to the build.
                  "artifactStorageSourceUri": "A String", # If provided, the input binary artifacts for the build came from this
                      # location.
                  "additionalContexts": [ # If provided, some of the source code used for the build may be found in
                      # these locations, in the case where the source repository had multiple
                      # remotes or submodules. This list will not include the context specified in
                      # the context field.
                    { # A SourceContext is a reference to a tree of files. A SourceContext together
                        # with a path point to a unique revision of a single file or directory.
                      "labels": { # Labels with user defined metadata.
                        "a_key": "A String",
                      },
                      "git": { # A GitSourceContext denotes a particular revision in a third party Git # A SourceContext referring to any third party Git repo (e.g., GitHub).
                          # repository (e.g., GitHub).
                        "url": "A String", # Git repository URL.
                        "revisionId": "A String", # Git commit hash.
                      },
                      "gerrit": { # A SourceContext referring to a Gerrit project. # A SourceContext referring to a Gerrit project.
                        "hostUri": "A String", # The URI of a running Gerrit instance.
                        "revisionId": "A String", # A revision (commit) ID.
                        "gerritProject": "A String", # The full project name within the host. Projects may be nested, so
                            # "project/subproject" is a valid project name. The "repo name" is the
                            # hostURI/project.
                        "aliasContext": { # An alias to a repo revision. # An alias, which may be a branch or tag.
                          "name": "A String", # The alias name.
                          "kind": "A String", # The alias kind.
                        },
                      },
                      "cloudRepo": { # A CloudRepoSourceContext denotes a particular revision in a Google Cloud # A SourceContext referring to a revision in a Google Cloud Source Repo.
                          # Source Repo.
                        "revisionId": "A String", # A revision ID.
                        "repoId": { # A unique identifier for a Cloud Repo. # The ID of the repo.
                          "projectRepoId": { # Selects a repo using a Google Cloud Platform project ID (e.g., # A combination of a project ID and a repo name.
                              # winged-cargo-31) and a repo name within that project.
                            "projectId": "A String", # The ID of the project.
                            "repoName": "A String", # The name of the repo. Leave empty for the default repo.
                          },
                          "uid": "A String", # A server-assigned, globally unique identifier.
                        },
                        "aliasContext": { # An alias to a repo revision. # An alias, which may be a branch or tag.
                          "name": "A String", # The alias name.
                          "kind": "A String", # The alias kind.
                        },
                      },
                    },
                  ],
                  "fileHashes": { # Hash(es) of the build source, which can be used to verify that the original
                      # source integrity was maintained in the build.
                      #
                      # The keys to this map are file paths used as build source and the values
                      # contain the hash values for those files.
                      #
                      # If the build source came in a single package such as a gzipped tarfile
                      # (.tar.gz), the FileHash will be for the single path to that file.
                    "a_key": { # Container message for hashes of byte content of files, used in source
                        # messages to verify integrity of source input to the build.
                      "fileHash": [ # Required. Collection of file hashes.
                        { # Container message for hash values.
                          "type": "A String", # Required. The type of hash that was performed.
                          "value": "A String", # Required. The hash value.
                        },
                      ],
                    },
                  },
                  "context": { # A SourceContext is a reference to a tree of files. A SourceContext together # If provided, the source code used for the build came from this location.
                      # with a path point to a unique revision of a single file or directory.
                    "labels": { # Labels with user defined metadata.
                      "a_key": "A String",
                    },
                    "git": { # A GitSourceContext denotes a particular revision in a third party Git # A SourceContext referring to any third party Git repo (e.g., GitHub).
                        # repository (e.g., GitHub).
                      "url": "A String", # Git repository URL.
                      "revisionId": "A String", # Git commit hash.
                    },
                    "gerrit": { # A SourceContext referring to a Gerrit project. # A SourceContext referring to a Gerrit project.
                      "hostUri": "A String", # The URI of a running Gerrit instance.
                      "revisionId": "A String", # A revision (commit) ID.
                      "gerritProject": "A String", # The full project name within the host. Projects may be nested, so
                          # "project/subproject" is a valid project name. The "repo name" is the
                          # hostURI/project.
                      "aliasContext": { # An alias to a repo revision. # An alias, which may be a branch or tag.
                        "name": "A String", # The alias name.
                        "kind": "A String", # The alias kind.
                      },
                    },
                    "cloudRepo": { # A CloudRepoSourceContext denotes a particular revision in a Google Cloud # A SourceContext referring to a revision in a Google Cloud Source Repo.
                        # Source Repo.
                      "revisionId": "A String", # A revision ID.
                      "repoId": { # A unique identifier for a Cloud Repo. # The ID of the repo.
                        "projectRepoId": { # Selects a repo using a Google Cloud Platform project ID (e.g., # A combination of a project ID and a repo name.
                            # winged-cargo-31) and a repo name within that project.
                          "projectId": "A String", # The ID of the project.
                          "repoName": "A String", # The name of the repo. Leave empty for the default repo.
                        },
                        "uid": "A String", # A server-assigned, globally unique identifier.
                      },
                      "aliasContext": { # An alias to a repo revision. # An alias, which may be a branch or tag.
                        "name": "A String", # The alias name.
                        "kind": "A String", # The alias kind.
                      },
                    },
                  },
                },
                "createTime": "A String", # Time at which the build was created.
                "projectId": "A String", # ID of the project.
                "logsUri": "A String", # URI where any logs for this provenance were written.
                "creator": "A String", # E-mail address of the user who initiated this build. Note that this was the
                    # user's e-mail address at the time the build was initiated; this address may
                    # not represent the same end-user for all time.
                "builderVersion": "A String", # Version string of the builder at the time this build was executed.
                "commands": [ # Commands requested by the build.
                  { # Command describes a step performed as part of the build pipeline.
                    "dir": "A String", # Working directory (relative to project source root) used when running this
                        # command.
                    "waitFor": [ # The ID(s) of the command(s) that this command depends on.
                      "A String",
                    ],
                    "env": [ # Environment variables set before running this command.
                      "A String",
                    ],
                    "args": [ # Command-line arguments used when executing this command.
                      "A String",
                    ],
                    "name": "A String", # Required. Name of the command, as presented on the command line, or if the
                        # command is packaged as a Docker container, as presented to `docker pull`.
                    "id": "A String", # Optional unique identifier for this command, used in wait_for to reference
                        # this command as a dependency.
                  },
                ],
                "builtArtifacts": [ # Output of the build.
                  { # Artifact describes a build product.
                    "checksum": "A String", # Hash or checksum value of a binary, or Docker Registry 2.0 digest of a
                        # container.
                    "id": "A String", # Artifact ID, if any; for container images, this will be a URL by digest
                        # like `gcr.io/projectID/imagename@sha256:123456`.
                    "names": [ # Related artifact names. This may be the path to a binary or jar file, or in
                        # the case of a container build, the name used to push the container image to
                        # Google Container Registry, as presented to `docker push`. Note that a
                        # single Artifact ID can have multiple names, for example if two tags are
                        # applied to one image.
                      "A String",
                    ],
                  },
                ],
                "id": "A String", # Required. Unique identifier of the build.
                "buildOptions": { # Special options applied to this build. This is a catch-all field where
                    # build providers can enter any desired additional details.
                  "a_key": "A String",
                },
              },
            },
            "discovered": { # Details of a discovery occurrence. # Describes when a resource was discovered.
              "discovered": { # Provides information about the analysis status of a discovered resource. # Required. Analysis status for the discovered resource.
                "analysisStatusError": { # The `Status` type defines a logical error model that is suitable for # When an error is encountered this will contain a LocalizedMessage under
                    # details to show to the user. The LocalizedMessage is output only and
                    # populated by the API.
                    # different programming environments, including REST APIs and RPC APIs. It is
                    # used by [gRPC](https://github.com/grpc). Each `Status` message contains
                    # three pieces of data: error code, error message, and error details.
                    #
                    # You can find out more about this error model and how to work with it in the
                    # [API Design Guide](https://cloud.google.com/apis/design/errors).
                  "details": [ # A list of messages that carry the error details.  There is a common set of
                      # message types for APIs to use.
                    {
                      "a_key": "", # Properties of the object. Contains field @type with type URL.
                    },
                  ],
                  "code": 42, # The status code, which should be an enum value of google.rpc.Code.
                  "message": "A String", # A developer-facing error message, which should be in English. Any
                      # user-facing error message should be localized and sent in the
                      # google.rpc.Status.details field, or localized by the client.
                },
                "analysisStatus": "A String", # The status of discovery for the resource.
                "continuousAnalysis": "A String", # Whether the resource is continuously analyzed.
                "lastAnalysisTime": "A String", # The last time continuous analysis was done for this resource.
                    # Deprecated, do not use.
              },
            },
            "noteName": "A String", # Required. Immutable. The analysis note associated with this occurrence, in
                # the form of `projects/[PROVIDER_ID]/notes/[NOTE_ID]`. This field can be
                # used as a filter in list requests.
            "deployment": { # Details of a deployment occurrence. # Describes the deployment of an artifact on a runtime.
              "deployment": { # The period during which some deployable was active in a runtime. # Required. Deployment history for the resource.
                "userEmail": "A String", # Identity of the user that triggered this deployment.
                "config": "A String", # Configuration used to create this deployment.
                "undeployTime": "A String", # End of the lifetime of this deployment.
                "platform": "A String", # Platform hosting this deployment.
                "deployTime": "A String", # Required. Beginning of the lifetime of this deployment.
                "address": "A String", # Address of the runtime element hosting this deployment.
                "resourceUri": [ # Output only. Resource URI for the artifact being deployed taken from
                    # the deployable field with the same name.
                  "A String",
                ],
              },
            },
            "createTime": "A String", # Output only. The time this occurrence was created.
            "updateTime": "A String", # Output only. The time this occurrence was last updated.
            "remediation": "A String", # A description of actions that can be taken to remedy the note.
            "intoto": { # This corresponds to a signed in-toto link - it is made up of one or more # Describes a specific in-toto link.
                # signatures and the in-toto link itself. This is used for occurrences of a
                # Grafeas in-toto note.
              "signed": { # This corresponds to an in-toto link.
                "command": [ # This field contains the full command executed for the step. This can also
                    # be empty if links are generated for operations that aren't directly mapped
                    # to a specific command. Each term in the command is an independent string
                    # in the list. An example of a command in the in-toto metadata field is:
                    # "command": ["git", "clone", "https://github.com/in-toto/demo-project.git"]
                  "A String",
                ],
                "byproducts": { # Defines an object for the byproducts field in in-toto links. The suggested # ByProducts are data generated as part of a software supply chain step, but
                    # are not the actual result of the step.
                    # fields are "stderr", "stdout", and "return-value".
                  "customValues": {
                    "a_key": "A String",
                  },
                },
                "environment": { # Defines an object for the environment field in in-toto links. The suggested # This is a field that can be used to capture information about the
                    # environment. It is suggested for this field to contain information that
                    # details environment variables, filesystem information, and the present
                    # working directory. The recommended structure of this field is:
                    # "environment": {
                    #   "custom_values": {
                    #     "variables": "<ENV>",
                    #     "filesystem": "<FS>",
                    #     "workdir": "<CWD>",
                    #     "<ANY OTHER RELEVANT FIELDS>": "..."
                    #   }
                    # }
                    # fields are "variables", "filesystem", and "workdir".
                  "customValues": {
                    "a_key": "A String",
                  },
                },
                "materials": [ # Materials are the supply chain artifacts that go into the step and are used
                    # for the operation performed. The key of the map is the path of the artifact
                    # and the structure contains the recorded hash information. An example is:
                    # "materials": [
                    #   {
                    #     "resource_uri": "foo/bar",
                    #     "hashes": {
                    #       "sha256": "ebebf...",
                    #       <OTHER HASH ALGORITHMS>: <HASH VALUE>
                    #     }
                    #   }
                    # ]
                  {
                    "hashes": { # Defines a hash object for use in Materials and Products.
                      "sha256": "A String",
                    },
                    "resourceUri": "A String",
                  },
                ],
                "products": [ # Products are the supply chain artifacts generated as a result of the step.
                    # The structure is identical to that of materials.
                  {
                    "hashes": { # Defines a hash object for use in Materials and Products.
                      "sha256": "A String",
                    },
                    "resourceUri": "A String",
                  },
                ],
              },
              "signatures": [
                { # A signature object consists of the KeyID used and the signature itself.
                  "sig": "A String",
                  "keyid": "A String",
                },
              ],
            },
            "derivedImage": { # Details of an image occurrence. # Describes how this resource derives from the basis in the associated
                # note.
              "derivedImage": { # Derived describes the derived image portion (Occurrence) of the DockerImage # Required. Immutable. The child image derived from the base image.
                  # relationship. This image would be produced from a Dockerfile with FROM
                  # <DockerImage.Basis in attached Note>.
                "fingerprint": { # A set of properties that uniquely identify a given Docker image. # Required. The fingerprint of the derived image.
                  "v2Blob": [ # Required. The ordered list of v2 blobs that represent a given image.
                    "A String",
                  ],
                  "v1Name": "A String", # Required. The layer ID of the final layer in the Docker image's v1
                      # representation.
                  "v2Name": "A String", # Output only. The name of the image's v2 blobs computed via:
                      #   [bottom] := v2_blobbottom := sha256(v2_blob[N] + " " + v2_name[N+1])
                      # Only the name of the final blob is kept.
                },
                "layerInfo": [ # This contains layer-specific metadata, if populated it has length
                    # "distance" and is ordered with [distance] being the layer immediately
                    # following the base image and [1] being the final layer.
                  { # Layer holds metadata specific to a layer of a Docker image.
                    "directive": "A String", # Required. The recovered Dockerfile directive used to construct this layer.
                    "arguments": "A String", # The recovered arguments to the Dockerfile directive.
                  },
                ],
                "distance": 42, # Output only. The number of layers by which this image differs from the
                    # associated image basis.
                "baseResourceUrl": "A String", # Output only. This contains the base image URL for the derived image
                    # occurrence.
              },
            },
          },
        ],
        "nextPageToken": "A String", # Token to provide to skip to a particular spot in the list.
      }

`list_next(previous_request, previous_response)`

    Retrieves the next page of results.

    Args:
      previous_request: The request for the previous page. (required)
      previous_response: The response from the request for the previous page. (required)

    Returns:
      A request object that you can call 'execute()' on to request the next
      page. Returns None if there are no more items in the collection.