public UnaryCallSettings.Builder<PerformMaintenanceRequest, Operation>
        performMaintenanceSettings() {
      return getStubSettingsBuilder().performMaintenanceSettings();
    }
Returns the builder for the settings used for calls to performMaintenance.
java-tpu/google-cloud-tpu/src/main/java/com/google/cloud/tpu/v2alpha1/TpuSettings.java