static Map<String, Class<? extends PipelineRunner<?>>> getRegisteredRunners() {
    return CACHE.get().supportedPipelineRunners;
  }
@Test
  public void testAutomaticRegistrationOfRunners() {
    assertEquals(
        REGISTERED_RUNNER,
        PipelineOptionsFactory.getRegisteredRunners()
            .get(REGISTERED_RUNNER.getSimpleName().toLowerCase()));
  }