docs: def get_objective_bank(self):
          """Gets the ``ObjectiveBank`` at this node.
  
          return: (osid.learning.ObjectiveBank) - the objective bank
                  represented by this node
          *compliance: mandatory -- This method must be implemented.*
  
          """
          if self._lookup_session is None:
              mgr = get_provider_manager('LEARNING', runtime=self._runtime, proxy=self._proxy)
              self._lookup_session = mgr.get_objective_bank_lookup_session(proxy=getattr(self, "_proxy", None))
          return self._lookup_session.get_objective_bank(Id(self._my_map['id']))