code: def get_service_references(self, clazz, ldap_filter=None):
          # type: (Optional[str], Optional[str]) -> Optional[List[ServiceReference]]
          
          refs = self.__framework.find_service_references(clazz, ldap_filter)
          if refs:
              for ref in refs:
                  if ref.get_bundle() is not self.__bundle:
                      refs.remove(ref)
  
          return refs
docs: Returns the service references for services that were registered under
          the specified class by this bundle and matching the given filter
  
          :param clazz: The class name with which the service was registered.
          :param ldap_filter: A filter on service properties
          :return: The list of references to the services registered by the
                   calling bundle and matching the filters.