@remove_null_proxy_kwarg<EOL><INDENT>def get_asset_composition_design_session(self):<DEDENT>
<EOL>return self._provider_manager.get_asset_composition_design_session()<EOL>
Gets the session for creating asset compositions.

        return: (osid.repository.AssetCompositionDesignSession) - an
                ``AssetCompositionDesignSession``
        raise:  OperationFailed - unable to complete request
        raise:  Unimplemented - ``supports_asset_composition_design()``
                is ``false``
        *compliance: optional -- This method must be implemented if
        ``supports_asset_composition_design()`` is ``true``.*