code: def get_repository_admin_session(self):
          
          if not self.supports_repository_admin():
              raise errors.Unimplemented()
          # pylint: disable=no-member
          return sessions.RepositoryAdminSession(runtime=self._runtime)
docs: Gets the repository administrative session for creating, updating and deleteing repositories.
  
          return: (osid.repository.RepositoryAdminSession) - a
                  ``RepositoryAdminSession``
          raise:  OperationFailed - unable to complete request
          raise:  Unimplemented - ``supports_repository_admin()`` is
                  ``false``
          *compliance: optional -- This method must be implemented if
          ``supports_repository_admin()`` is ``true``.*