When listening to signals, how to register callbacks that require internal types?

[Raspincel]

Hi! I'm very new to Godot, so my terminology might be a little off, but please bear with me.

Some signals, such as the OnBodyEntered and OnBodyExited from the Area2D class, have signatures like this:

func (self Instance) OnBodyEntered(cb func(body [1]gdclass.Node2D));
func (self Instance) OnBodyExited(cb func(body [1]gdclass.Node2D));

The problem is I don't know how to actually call these functions to register the callback I want. More precisely, I don't know how to type the parameter body of the callback.

Doing it like this is impossible, since gdclass is an internal package and it's not possible to import things from there:

I've tried using Node2D.Instance instead, but Node2D.Instance is a new type, not an alias of [1]gdclass.Node2D, so the compiler doesn't like that:

What can I actually do to listen to this signal and then run some code in Go? Am I doing something wrong? Is there an alternative method to do it?

[Splizard]

Ah, thanks for reporting this, it is a bit awkward but currently you can use the classdb alias for the type ie. classdb.Node2D and then you can assign the argument to a Node2D.Instance.

[Raspincel]

Thanks so much! That worked perfectly. Now I even see that there's a whole bunch of aliases that might come in handy later. Really appreciate the help!