Timeline header python modification I would like to add a custom frame rate slider in the timeline header, but I can't figure out how to do it. 



I've tried to add following line in space_time.py (between line 75 and 77), but nothing happens:

layout.prop(scene, "render.fps", text="")


What am I missing? 

Thanks.
Here is how it should be : 

layout.prop(scene.render, "fps", text="fps") 
since the property is fps  and it is in scene.render