addUIDrawables(drawManager, frameContext) -> self
Provides access to the MUIDrawManager, which can be used to queue up operations to draw simple UI shapes like lines, circles, text, etc.
This method will only be called when hasUIDrawables() is overridden to return true.
* drawManager (MUIDrawManager) - The UI draw manager, it can be used to draw some simple geometry including text.
* frameContext (MFrameContext) - Frame level context information