private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.vertexai.api.Examples.ExampleGcsSource,
            com.google.cloud.vertexai.api.Examples.ExampleGcsSource.Builder,
            com.google.cloud.vertexai.api.Examples.ExampleGcsSourceOrBuilder>
        getExampleGcsSourceFieldBuilder() {
      if (exampleGcsSourceBuilder_ == null) {
        if (!(sourceCase_ == 5)) {
          source_ = com.google.cloud.vertexai.api.Examples.ExampleGcsSource.getDefaultInstance();
        }
        exampleGcsSourceBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.vertexai.api.Examples.ExampleGcsSource,
                com.google.cloud.vertexai.api.Examples.ExampleGcsSource.Builder,
                com.google.cloud.vertexai.api.Examples.ExampleGcsSourceOrBuilder>(
                (com.google.cloud.vertexai.api.Examples.ExampleGcsSource) source_,
                getParentForChildren(),
                isClean());
        source_ = null;
      }
      sourceCase_ = 5;
      onChanged();
      return exampleGcsSourceBuilder_;
    }
<pre>
The Cloud Storage input instances.
</pre>

<code>.google.cloud.vertexai.v1.Examples.ExampleGcsSource example_gcs_source = 5;</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/Examples.java