SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function maxMap (children 1)
     ExpressionList (children 1)
      Identifier val
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function values (children 1)
       ExpressionList (children 3)
        Literal \'val Map(String, String)\'
        Function map (children 1)
         ExpressionList (children 2)
          Literal \'1\'
          Literal \'1\'
        Function map (children 1)
         ExpressionList (children 2)
          Literal \'1\'
          Literal \'2\'