SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function polygonsSymDifferenceCartesian (children 1)
     ExpressionList (children 2)
      Function array (children 1)
       ExpressionList (children 1)
        Function array (alias x) (children 1)
         ExpressionList (children 1)
          Function array (children 1)
           ExpressionList (children 1)
            Literal Tuple_(Float64_1, Float64_1)
      Function array (children 1)
       ExpressionList (children 1)
        Identifier x
   ExpressionList (children 1)
    Identifier x
