private void ensureAnnotationsIsMutable() {
      if (!((bitField0_ & 0x00000002) != 0)) {
        annotations_ =
            new java.util.ArrayList<
                com.google.cloud.visionai.v1.AppPlatformCloudFunctionRequest
                    .StructedInputAnnotation>(annotations_);
        bitField0_ |= 0x00000002;
      }
    }
<pre>
The metadata of the AppPlatform for customer to identify the source of the
payload.
</pre>

<code>.google.cloud.visionai.v1.AppPlatformMetadata app_platform_metadata = 1;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/AppPlatformCloudFunctionRequest.java