def get_bugs_summaries(self, bugids):
        """
        Get multiple bug objects' summaries only (faster).

        param bugids: ``list`` of ``int``, bug numbers.
        returns: deferred that when fired returns a list of ``AttrDict``s
                 representing these bugs.
        """
        payload = {'ids': bugids, 'include_fields': ['id', 'summary']}
        d = self.call('Bug.get', payload)
        d.addCallback(self._parse_bugs_callback)
        return d