public PagedCallSettings<
          ListRuntimeVersionsRequest, ListRuntimeVersionsResponse, ListRuntimeVersionsPagedResponse>
      listRuntimeVersionsSettings() {
    return ((TpuStubSettings) getStubSettings()).listRuntimeVersionsSettings();
  }
Returns the object with the settings used for calls to listRuntimeVersions.
java-tpu/google-cloud-tpu/src/main/java/com/google/cloud/tpu/v2alpha1/TpuSettings.java