code: def cancel_orders(self, market_id, instructions, customer_ref=None):
          
          return self.make_api_request(
              'Sports',
              'cancelOrders',
              utils.get_kwargs(locals()),
              model=models.CancelExecutionReport,
          )
docs: Cancel all bets OR cancel all bets on a market OR fully or
          partially cancel particular orders on a market.
  
          :param str market_id: If not supplied all bets are cancelled
          :param list instructions: List of `CancelInstruction` objects
          :param str customer_ref: Optional order identifier string