SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayReduce (children 1)
     ExpressionList (children 2)
      Literal \'maxOrDefault\'
      Function arrayPopBack (children 1)
       ExpressionList (children 1)
        Literal Array_[\'hello\']