def get_composition_admin_session(self, proxy=None):
<EOL>return self._provider_manager.get_composition_admin_session(proxy)<EOL>
Gets a composition administration session for creating, updating and
        deleting compositions.

        arg:    proxy (osid.proxy.Proxy): a proxy
        return: (osid.repository.CompositionAdminSession) - a
                ``CompositionAdminSession``
        raise:  NullArgument - ``proxy`` is ``null``
        raise:  OperationFailed - unable to complete request
        raise:  Unimplemented - ``supports_composition_admin()`` is
                ``false``
        *compliance: optional -- This method must be implemented if
        ``supports_composition_admin()`` is ``true``.*