def get_composition_lookup_session(self, proxy=None):
<EOL>return self._provider_manager.get_composition_lookup_session(proxy)<EOL>
Gets the ``OsidSession`` associated with the composition lookup service.

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