VisualD Can now execute class/struct methods __debugOverview, __debugExpaanded, __debugTextView to customize display in the debugger

[FunkyD via Digitalmars-d-debugger]

Can now execute class/struct methods __debugOverview, 
__debugExpaanded, __debugTextView
to customize display in the debugger

? How does one use these I can't find anything else about them, 
not in the source code.