code: def get_channel(self, chan_name, coll_name, exp_name):
          
          chan = ChannelResource(chan_name, coll_name, exp_name)
          return self.get_project(chan)
docs: Helper that gets a fully initialized ChannelResource for an *existing* channel.
  
          Args:
              chan_name (str): Name of channel.
              coll_name (str): Name of channel's collection.
              exp_name (str): Name of channel's experiment.
  
          Returns:
              (intern.resource.boss.ChannelResource)