code: def is_valid_channel(self,
                           channel,
                           conda_url='https://conda.anaconda.org',
                           non_blocking=True):
          
          logger.debug(str((channel, conda_url)))
          if non_blocking:
              method = self._is_valid_channel
              return self._create_worker(method, channel, conda_url)
          else:
              return self._is_valid_channel(channel, conda_url=conda_url)
docs: Check if a conda channel is valid.