code: def get_configured_rc_input_names(self, channel):
          
          ret_val = []
          for key in self._ulog.initial_parameters:
              param_val = self._ulog.initial_parameters[key]
              if key.startswith('RC_MAP_') and param_val == channel + 1:
                  ret_val.append(key[7:].capitalize())
  
          if len(ret_val) > 0:
              return ret_val
          return None
docs: find all RC mappings to a given channel and return their names
  
          :param channel: input channel (0=first)
          :return: list of strings or None