private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.visionai.v1.AppPlatformMetadata,
            com.google.cloud.visionai.v1.AppPlatformMetadata.Builder,
            com.google.cloud.visionai.v1.AppPlatformMetadataOrBuilder>
        getAppPlatformMetadataFieldBuilder() {
      if (appPlatformMetadataBuilder_ == null) {
        appPlatformMetadataBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.visionai.v1.AppPlatformMetadata,
                com.google.cloud.visionai.v1.AppPlatformMetadata.Builder,
                com.google.cloud.visionai.v1.AppPlatformMetadataOrBuilder>(
                getAppPlatformMetadata(), getParentForChildren(), isClean());
        appPlatformMetadata_ = null;
      }
      return appPlatformMetadataBuilder_;
    }
<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