# How to change return value of builtin function?

**URL:** <https://discourse.julialang.org/t/how-to-change-return-value-of-builtin-function/99337>\
**Category:** New to Julia\
**Tags:** question, package\
**Created:** [May 24, 2023, 3:07pm UTC](https://discourse.julialang.org/t/how-to-change-return-value-of-builtin-function/99337 "2023-05-24T15:07:30Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Enc](https://avatars.discourse-cdn.com/v4/letter/e/7ab992/32.png) [@Enc](https://discourse.julialang.org/u/Enc)\
**Post date:** [May 24, 2023, 3:07pm UTC](https://discourse.julialang.org/t/how-to-change-return-value-of-builtin-function/99337/1 "2023-05-24T15:07:31Z")

</div>

I want to change return string value of header function in TerminalMenus package for my menu. How to do it?

For example, i want header to return “test in printed”.

---

<div class="post-metadata">

**Author:** ![contradict](https://avatars.discourse-cdn.com/v4/letter/c/ac91a4/32.png) [@contradict](https://discourse.julialang.org/u/contradict)\
**Post date:** [May 24, 2023, 3:38pm UTC](https://discourse.julialang.org/t/how-to-change-return-value-of-builtin-function/99337/2 "2023-05-24T15:38:32Z")

</div>

```julia
julia> using REPL.TerminalMenus

julia> import REPL.TerminalMenus: header

julia> header(m::RadioMenu) = "test in printed"                                                                                                                               
header (generic function with 4 methods)                                                                                                                                      
                                                                                                                                                                              
julia> options = ["apple", "orange", "grape", "strawberry",                                                                                                                   
                   "blueberry", "peach", "lemon", "lime"];                                                                                                   
                                                                                                                                                                              
julia> menu = RadioMenu(options, pagesize=4);                                                                                                                
                                                                                                                                                                              
julia> choice = request("Choose your favorite fruit:", menu)                                                                                                                  
Choose your favorite fruit:                                                                                                                                                   
test in printed                                                                                                                                                               
   apple                                                                                                                                                                      
 > orange                                                                                                                                                                     
   grape                                                                                                                                                                      
v strawberry                                                                                                                                                                 
2                                                                                                                                                                             
                                                                                                                                                                              

```