code: async def AddCharm(self, channel, url):
          '''
          channel : str
          url : str
          Returns -> None
          '''
          # map input types to rpc msg
          _params = dict()
          msg = dict(type='Client',
                     request='AddCharm',
                     version=1,
                     params=_params)
          _params['channel'] = channel
          _params['url'] = url
          reply = await self.rpc(msg)
          return replync def AddCharm(self, channel, url):
          '''
          channel : str
          url : str
          Returns -> None
          '''
          # map input types to rpc msg
          _params = dict()
          msg = dict(type='Client',
                     request='AddCharm',
                     version=1,
                     params=_params)
          _params['channel'] = channel
          _params['url'] = url
          reply = await self.rpc(msg)
          return reply
docs: channel : str
          url : str
          Returns -> None