public static UpdateRequirement fromJson(String json) {
    return JsonUtil.parse(json, UpdateRequirementParser::fromJson);
  }
@Test
  public void testAssertTableDoesNotExistFromJson() {
    String requirementType = UpdateRequirementParser.ASSERT_TABLE_DOES_NOT_EXIST;
    String json = "{\"type\":\"assert-create\"}";
    UpdateRequirement expected = new UpdateRequirement.AssertTableDoesNotExist();
    assertEquals(requirementType, expected, UpdateRequirementParser.fromJson(json));
  }