def get_routers(self, context, router_ids=None, hd_ids=None):
cctxt = self.client.prepare(version='<STR_LIT>')<EOL>return cctxt.call(context, '<STR_LIT>', host=self.host,<EOL>router_ids=router_ids, hosting_device_ids=hd_ids)<EOL>
Make a remote process call to retrieve the sync data for routers.

        :param context: session context
        :param router_ids: list of  routers to fetch
        :param hd_ids: hosting device ids, only routers assigned to these
                       hosting devices will be returned.