public int getVersion() {
    return _version;
  }
@Test
  public void withDisabledNull()
      throws JsonProcessingException {
    String confStr = "{\"disabled\": null}";
    RangeIndexConfig config = JsonUtils.stringToObject(confStr, RangeIndexConfig.class);

    assertFalse(config.isDisabled(), "Unexpected disabled");
    assertEquals(config.getVersion(), RangeIndexConfig.DEFAULT.getVersion(), "Unexpected version");
  }