SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayMap (children 1)
     ExpressionList (children 3)
      Function lambda (children 1)
       ExpressionList (children 2)
        Function tuple (children 1)
         ExpressionList (children 2)
          Identifier x
          Identifier y
        Function plus (children 1)
         ExpressionList (children 2)
          Identifier x
          Identifier y
      Function array (children 1)
       ExpressionList
      Function array (children 1)
       ExpressionList
