diff --git a/proto-google-cloud-containeranalysis-v1/src/main/java/com/google/containeranalysis/v1/GetVulnerabilityOccurrencesSummaryRequest.java b/proto-google-cloud-containeranalysis-v1/src/main/java/com/google/containeranalysis/v1/GetVulnerabilityOccurrencesSummaryRequest.java
index 7231b6fc..66322147 100644
--- a/proto-google-cloud-containeranalysis-v1/src/main/java/com/google/containeranalysis/v1/GetVulnerabilityOccurrencesSummaryRequest.java
+++ b/proto-google-cloud-containeranalysis-v1/src/main/java/com/google/containeranalysis/v1/GetVulnerabilityOccurrencesSummaryRequest.java
@@ -241,10 +241,10 @@ public final boolean isInitialized() {
 
   @java.lang.Override
   public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-    if (!getParentBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(parent_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 1, parent_);
     }
-    if (!getFilterBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(filter_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 2, filter_);
     }
     unknownFields.writeTo(output);
@@ -256,10 +256,10 @@ public int getSerializedSize() {
     if (size != -1) return size;
 
     size = 0;
-    if (!getParentBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(parent_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, parent_);
     }
-    if (!getFilterBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(filter_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(2, filter_);
     }
     size += unknownFields.getSerializedSize();
diff --git a/proto-google-cloud-containeranalysis-v1/src/main/java/com/google/containeranalysis/v1/VulnerabilityOccurrencesSummary.java b/proto-google-cloud-containeranalysis-v1/src/main/java/com/google/containeranalysis/v1/VulnerabilityOccurrencesSummary.java
index b1835121..79eaabc8 100644
--- a/proto-google-cloud-containeranalysis-v1/src/main/java/com/google/containeranalysis/v1/VulnerabilityOccurrencesSummary.java
+++ b/proto-google-cloud-containeranalysis-v1/src/main/java/com/google/containeranalysis/v1/VulnerabilityOccurrencesSummary.java
@@ -459,7 +459,7 @@ public final boolean isInitialized() {
 
     @java.lang.Override
     public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-      if (!getResourceUriBytes().isEmpty()) {
+      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(resourceUri_)) {
         com.google.protobuf.GeneratedMessageV3.writeString(output, 1, resourceUri_);
       }
       if (severity_ != io.grafeas.v1.Severity.SEVERITY_UNSPECIFIED.getNumber()) {
@@ -480,7 +480,7 @@ public int getSerializedSize() {
       if (size != -1) return size;
 
       size = 0;
-      if (!getResourceUriBytes().isEmpty()) {
+      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(resourceUri_)) {
         size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, resourceUri_);
       }
       if (severity_ != io.grafeas.v1.Severity.SEVERITY_UNSPECIFIED.getNumber()) {
diff --git a/synth.metadata b/synth.metadata
index 77fce3cd..6d2de4a6 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -4,15 +4,15 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-containeranalysis.git",
-        "sha": "ed0df7d8cf7850854844826362d401e87d3870db"
+        "sha": "345cd80877bce3c41d30809461d176d25310b5cf"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "e1738ee972b49fd0c4d4718b035444495142b781",
-        "internalRef": "391407209"
+        "sha": "d2977af9e9f1fc0c9dc8368352daa032471f3c63",
+        "internalRef": "403132955"
       }
     },
     {