Self deleting lambda signals in Godot

main.gd

extends Node
signal sig

class SigTest:
    var x: int = 0
        
    func on_signal(sig: Signal, callable: Callable):
        var this_object_weakref: WeakRef = weakref(self)
        var wrapped_callable: Callable = func(f: Callable):
            if this_object_weakref.get_ref() == null:
                sig.disconnect(f)
                return
            callable.call(this_object_weakref.get_ref())
        sig.connect(wrapped_callable.bind(wrapped_callable))

func _ready():
	var my_sigtest: SigTest = SigTest.new()
    
    my_sigtest.on_signal(self.sig, func(st: SigTest):
    	print("hello"))
    my_sigtest.on_signal(self.sig, func(st: SigTest):
        print("world"))
    
    sig.emit()
    print(sig.get_connections())
    
func _process(delta: float):
    print(sig.get_connections())
	sig.emit()
    print('emitting')
    print(sig.get_connections())
    

Here I present to you, oh fortunate reader, a self-disconnecting object-bound anonymous signal connection pattern for gdscript, for your reading pleasure.