@Override
  protected String getRestApiVersion() {
    return REST_API_VERSION;
  }
The PdxBasedCrudController class serving REST Requests related to the REST CRUD operation on
region

@see org.springframework.stereotype.Controller
@since GemFire 8.0
geode-web-api/src/main/java/org/apache/geode/rest/internal/web/controllers/PdxBasedCrudController.java