code: def _start_claim_channels(self, grpc_channel, channels_ids):
          
          unclaimed_payments = self._call_GetListUnclaimed(grpc_channel)
          unclaimed_payments_dict = {p["channel_id"] : p for p in unclaimed_payments}
  
          to_claim = []
          for channel_id in channels_ids:
              if (channel_id not in unclaimed_payments_dict or unclaimed_payments_dict[channel_id]["amount"] == 0):
                  self._printout("There is nothing to claim for channel %i, we skip it"%channel_id)
                  continue
              blockchain = self._get_channel_state_from_blockchain(channel_id)
              if (unclaimed_payments_dict[channel_id]["nonce"] != blockchain["nonce"]):
                  self._printout("Old payment for channel %i is still in progress. Please run claim for this channel later."%channel_id)
                  continue
              to_claim.append((channel_id,  blockchain["nonce"]))
  
          payments = [self._call_StartClaim(grpc_channel, channel_id, nonce) for channel_id, nonce in to_claim]
          return payments
docs: Safely run StartClaim for given channels