SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayFold (children 1)
     ExpressionList (children 3)
      Function lambda (children 1)
       ExpressionList (children 2)
        Function tuple (children 1)
         ExpressionList (children 2)
          Identifier acc
          Identifier x
        Function arrayPushBack (children 1)
         ExpressionList (children 2)
          Identifier acc
          Identifier x
      Literal Array_[UInt64_1, UInt64_2, UInt64_3, UInt64_4]
      Function emptyArrayInt64 (children 1)
       ExpressionList
