SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function minMap (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(UInt256, UInt256)\'
        Function map (children 1)
         ExpressionList (children 2)
          Literal UInt64_1
          Literal UInt64_1
        Function map (children 1)
         ExpressionList (children 2)
          Literal UInt64_1
          Literal UInt64_2