docs: def get_gradebook_column(self):
          """Gets the ``GradebookColumn``.
  
          return: (osid.grading.GradebookColumn) - the ``GradebookColumn``
          raise:  OperationFailed - unable to complete request
          *compliance: mandatory -- This method must be implemented.*
  
          """
          # Implemented from template for osid.learning.Activity.get_objective
          if not bool(self._my_map['gradebookColumnId']):
              raise errors.IllegalState('gradebook_column empty')
          mgr = self._get_provider_manager('GRADING')
          if not mgr.supports_gradebook_column_lookup():
              raise errors.OperationFailed('Grading does not support GradebookColumn lookup')
          lookup_session = mgr.get_gradebook_column_lookup_session(proxy=getattr(self, "_proxy", None))
          lookup_session.use_federated_gradebook_view()
          return lookup_session.get_gradebook_column(self.get_gradebook_column_id())