P=ParamSpec('P')T_co=TypeVar('T_co',covariant=True)classTypedSignal(Generic[P,T_co]):def__init__(self,spec:Callable[P,T_co])->None: ...defconnect(self,handler:Callable[P,T_co])->Callable[P,T_co]: ...defsend(self,*args:P.args,**kwargs:P.kwargs)->list[tuple[Callable[P,T_co],T_co]]: ...@TypedSignaldefmy_signal(sender:SomeType,arg:OtherType)->ReturnType: ...@my_signal.connectdefmy_signal_handler(sender:SomeType,arg:OtherType)->ReturnType:# Insert real implementation