T=TypeVar("T")U=TypeVar("U")classKey(Generic[T]):    ...classCustomDict(dict[Key[Any]|str,Any]):@overload# type: ignore[override]defget(self,__key:Key[T])->T|None:        ...@overloaddefget(self,__key:Key[T],__default:U)->T|U:        ...@overloaddefget(self,__key:str)->Any|None:        ...@overloaddefget(self,__key:str,__default:Any)->Any:        ...defget(self,__key:Key[Any]|str,__default:Any=None)->Any:"""Forward to super implementation."""returnsuper().get(__key,__default)# overloads for __getitem__, setdefault, pop# ...@overload# type: ignore[override]def__setitem__(self,key:Key[T],value:T)->None:        ...@overloaddef__setitem__(self,key:str,value:Any)->None:        ...def__setitem__(self,key:Key[Any]|str,value:Any)->None:"""Forward to super implementation."""returnsuper().__setitem__(key,value)

d=CustomDict()key=Key[int]()other_key="other"assert_type(d.get(key),int|None)assert_type(d.get("other"),Any|None)

defa2(d:CustomDict)->None:if (var:=d.get("arg"))isNone:var=d["arg"]= {}reveal_type(var)