Changing lightbar mode in Lua

Hello,

I would like to be able to change the lightbar mode (chase, takedown, and so on) from Lua. Unfortunately, the only thing I found so far (in vehicle VM) is electrics.set_lightbar_state(..).
After going through the Lua code, I've noticed that in \lua\vehicle\controller\lightbar.lua, there is a function called setModeIndex, but I cannot figure out how to access it from either the GE VM or vehicle VM.

If anyone could point me to the right direction, I would greatly appreciate it. Thanks!

 

Code:

local lightbar = controller.getController("lightbar_rear")
lightbar.setModeIndex(1)

This works only in VE

 

Thanks! Though, in my case, I had to call

Code:

controller.getController("lightbar")

to get the modes to switch.