@JsonAnyGetter
  public Map<String, Object> getAttributes() {
    return this.attributes;
  }
@Test
  public void testAttributes() throws Exception {
    Tag tag =
        loadObject("fixtures/workflows/definition/sample-tag-with-attributes.json", Tag.class);
    assertNotNull(tag.getAttributes());
    assertEquals(4, tag.getAttributes().size());
    assertEquals("maestro-dev", tag.getAttributes().get("creator"));
    assertEquals("maestro-dev", tag.getAttributes().get("technical_support"));
    assertEquals(1234L, tag.getAttributes().get("created_at_milli"));
  }