code: async def RelationById(self, relation_ids):
          '''
          relation_ids : typing.Sequence[int]
          Returns -> typing.Sequence[~RelationResult]
          '''
          # map input types to rpc msg
          _params = dict()
          msg = dict(type='Uniter',
                     request='RelationById',
                     version=5,
                     params=_params)
          _params['relation-ids'] = relation_ids
          reply = await self.rpc(msg)
          return replync def RelationById(self, relation_ids):
          '''
          relation_ids : typing.Sequence[int]
          Returns -> typing.Sequence[~RelationResult]
          '''
          # map input types to rpc msg
          _params = dict()
          msg = dict(type='Uniter',
                     request='RelationById',
                     version=5,
                     params=_params)
          _params['relation-ids'] = relation_ids
          reply = await self.rpc(msg)
          return reply
docs: relation_ids : typing.Sequence[int]
          Returns -> typing.Sequence[~RelationResult]