The current version of the API is v2:
.. toctree:: :maxdepth: 2 gapic/v2/api gapic/v2/types
Support for the previous API release, v1, is provided for code previously
written against it. In order to use this release, you will want to import from
e.g. google.cloud.trace_v1 in lieu of google.cloud.trace_v2.
.. toctree:: :maxdepth: 2 gapic/v1/api gapic/v1/types
For a list of all google-cloud-trace releases:
.. toctree:: :maxdepth: 2 changelog