code: def _namespace_requested(self, namespace):
          
          if namespace is None:
              return False
          namespace_tuple = self._tuplefy_namespace(namespace)
          if namespace_tuple[0] in IGNORE_DBS:
              return False
          elif namespace_tuple[1] in IGNORE_COLLECTIONS:
              return False
          else:
              return self._tuple_requested(namespace_tuple)
docs: Checks whether the requested_namespaces contain the provided
              namespace