Extension Method in UnityEvent Inspector Panel?

I am trying to add some usability extensions to a Scene for some colleagues to be able to add basic script-functionality just through the inspector. I can write extension methods for my scripts, but was hoping they could show up in the Action() part of a Script with:

Code (CSharp):

1. public UnityEvent Action;

I'm not seeing any Extension Methods in the list under GameObject though (just the built in Unity public functions)

Extension method:

Code (CSharp):

1. public static class ExtensionMethods
2. {
3.     public static void ToggleActive(this GameObject obj)
4.     {
5.         obj.SetActive(!obj.activeSelf);
6.     }
7. }

Is this known behaviour (2017.4), and is there a preferred way of doing this sort of thing that I should be moving over to?

Thanks,

Don
have a great day

 

Extension methods are just syntax sugar around a static method call. Nothing is actually being added to the object, so its impossible for Unity to reflect into the object to pick up the method -- it simply doesn't exist.