@JsonAnyGetter
  public Map<String, Object> getExtraInfo() {
    return extraInfo;
  }
@Test
  public void testRoundTripSerde() throws Exception {
    WorkflowCreateRequest request =
        loadObject("fixtures/api/sample-workflow-create-request.json", WorkflowCreateRequest.class);
    assertEquals(
        request, MAPPER.readValue(MAPPER.writeValueAsString(request), WorkflowCreateRequest.class));
    assertEquals("foo", request.getExtraInfo().get("additional_meta"));
  }