SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayMap (children 1)
     ExpressionList (children 2)
      Function lambda (children 1)
       ExpressionList (children 2)
        Function tuple (children 1)
         ExpressionList (children 1)
          Identifier x
        Identifier x
      Function array (children 1)
       ExpressionList (children 1)
        Function tuple (children 1)
         ExpressionList (children 1)
          Literal UInt64_1
