private com.google.protobuf.RepeatedFieldBuilderV3<
            com.google.cloud.tpu.v1.TensorFlowVersion,
            com.google.cloud.tpu.v1.TensorFlowVersion.Builder,
            com.google.cloud.tpu.v1.TensorFlowVersionOrBuilder>
        getTensorflowVersionsFieldBuilder() {
      if (tensorflowVersionsBuilder_ == null) {
        tensorflowVersionsBuilder_ =
            new com.google.protobuf.RepeatedFieldBuilderV3<
                com.google.cloud.tpu.v1.TensorFlowVersion,
                com.google.cloud.tpu.v1.TensorFlowVersion.Builder,
                com.google.cloud.tpu.v1.TensorFlowVersionOrBuilder>(
                tensorflowVersions_,
                ((bitField0_ & 0x00000001) != 0),
                getParentForChildren(),
                isClean());
        tensorflowVersions_ = null;
      }
      return tensorflowVersionsBuilder_;
    }
<pre>
The listed nodes.
</pre>

<code>repeated .google.cloud.tpu.v1.TensorFlowVersion tensorflow_versions = 1;</code>
java-tpu/proto-google-cloud-tpu-v1/src/main/java/com/google/cloud/tpu/v1/ListTensorFlowVersionsResponse.java