async def StartUnitCompletion(self, entities, message):
        '''
        entities : typing.Sequence[~Entity]
        message : str
        Returns -> typing.Sequence[~ErrorResult]
        '''
        # map input types to rpc msg
        _params = dict()
        msg = dict(type='UpgradeSeries',
                   request='StartUnitCompletion',
                   version=1,
                   params=_params)
        _params['entities'] = entities
        _params['message'] = message
        reply = await self.rpc(msg)
        return reply