docs: protected static AbstractPlanNode addSendReceivePair(AbstractPlanNode scanNode) {
          SendPlanNode sendNode = new SendPlanNode();
          sendNode.addAndLinkChild(scanNode);
  
          ReceivePlanNode recvNode = new ReceivePlanNode();
          recvNode.addAndLinkChild(sendNode);
  
          return recvNode;
      }