Translating DynamicGI.SetEmissive script from C# to javascript not working

Hi - I'm struggling to work out how to translate this script from C# to javascript, as I want to insert it into a script I've already written in javascript.

It's to turn on the emission of an object on pressing a key down.

But the update function is throwing up lots of errors and I'm struggling to find an example in javascript.

 #pragma strict
 
 var lightwall : Renderer;
 
 var worldprobe : Transform;
 
 function Start () {
 
 var lighton : boolean = false;
 
 }
 
 function Update () {
 
     if (Input.GetKeyDown(KeyCode.T))
         {
 
             lighton = !lighton;
 
         }
 
 
         if (lighton)
         {
             Color final = Color.grey * Mathf.LinearToGammaSpace(5);
             lightwall.material.SetColor("_EmissionColor", final);
             DynamicGI.SetEmissive(lightwall, final);
         }
         else
         {
             Color final = Color.grey * Mathf.LinearToGammaSpace(0);
             lightwall.material.SetColor("_EmissionColor", final);
             DynamicGI.SetEmissive(lightwall, final);
         }
     
 
     }
 }

Could anyone point me in the right direction as to how I can alter these lines to work in javascript?

 Color final = Color.grey * Mathf.LinearToGammaSpace(5);
              lightwall.material.SetColor("_EmissionColor", final);
              DynamicGI.SetEmissive(lightwall, final);

Best, Laurien