How do I extend the SLevelEditor from a plugin?

I’d like for my plugin window to be located in the SLevelEditor “Modes” Tab when it is loaded into the editor as shown in my image.

I’ve tried using the widget reflector to obtain information about that tab but i could not figure out how to extend it.

Each of those tabs corresponds to an editor mode, so you’ll have to create and register your own editor mode by subclassing FEdMode.

Awesome! Thank you very much.