def get_gradebook_column_smart_gradebook_session(self, gradebook_id=None):
if gradebook_id is None:<EOL><INDENT>raise NullArgument<EOL><DEDENT>raise Unimplemented()<EOL>
Gets the session for managing smart gradebooks of gradebook columns.

        arg:    gradebook_id (osid.id.Id): the ``Id`` of the gradebook
        return: (osid.grading.GradebookColumnSmartGradebookSession) - a
                ``GradebookColumnSmartGradebookSession``
        raise:  NotFound - ``gradebook_id`` not found
        raise:  NullArgument - ``gradebook_id`` is ``null``
        raise:  OperationFailed - unable to complete request
        raise:  Unimplemented -
                ``supports_gradebook_column_smart_gradebook()`` is
                ``false``
        *compliance: optional -- This method must be implemented if
        ``supports_gradebook_column_smart_gradebook()`` is ``true``.*