public OperationCallSettings.Builder<CreateNodeRequest, Node, OperationMetadata>
        createNodeOperationSettings() {
      return createNodeOperationSettings;
    }
Returns the builder for the settings used for calls to createNode.
java-tpu/google-cloud-tpu/src/main/java/com/google/cloud/tpu/v2alpha1/stub/TpuStubSettings.java