SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function mapFilter (children 1)
     ExpressionList (children 3)
      Function lambda (children 1)
       ExpressionList (children 2)
        Function tuple (children 1)
         ExpressionList (children 2)
          Identifier x
          Identifier y
        Function tuple (children 1)
         ExpressionList (children 2)
          Identifier x
          Function plus (children 1)
           ExpressionList (children 2)
            Identifier x
            Literal UInt64_1
      Function map (children 1)
       ExpressionList (children 4)
        Literal UInt64_1
        Literal UInt64_0
        Literal UInt64_2
        Literal UInt64_0
      Function map (children 1)
       ExpressionList (children 4)
        Literal UInt64_1
        Literal UInt64_0
        Literal UInt64_2
        Literal UInt64_0