@utilities.arguments_not_none<EOL><INDENT>def assign_gradebook_column_to_gradebook(self, gradebook_column_id, gradebook_id):<DEDENT>
<EOL>mgr = self._get_provider_manager('<STR_LIT>', local=True)<EOL>lookup_session = mgr.get_gradebook_lookup_session(proxy=self._proxy)<EOL>lookup_session.get_gradebook(gradebook_id)  <EOL>self._assign_object_to_catalog(gradebook_column_id, gradebook_id)<EOL>
Adds an existing ``GradebookColumn`` to a ``Gradebook``.

        arg:    gradebook_column_id (osid.id.Id): the ``Id`` of the
                ``GradebookColumn``
        arg:    gradebook_id (osid.id.Id): the ``Id`` of the
                ``Gradebook``
        raise:  AlreadyExists - ``gradebook_column_id`` is already
                assigned to ``gradebook_id``
        raise:  NotFound - ``gradebook_column_id`` or ``gradebook_id``
                not found
        raise:  NullArgument - ``gradebook_column_id`` or
                ``gradebook_id`` is ``null``
        raise:  OperationFailed - unable to complete request
        raise:  PermissionDenied - authorization failure
        *compliance: mandatory -- This method must be implemented.*