SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 3)
    Function map (alias m) (children 1)
     ExpressionList (children 4)
      Literal UInt64_1
      Literal UInt64_2
      Literal UInt64_3
      Literal UInt64_4
    Function toJSONString (alias s) (children 1)
     ExpressionList (children 1)
      Identifier m
    Function isValidJSON (children 1)
     ExpressionList (children 1)
      Identifier s
