weakref.proxy is not generic

[septatrix]

As weakref.proxy is not generic which can be seen here _weakref.py what is the intended way to annotate it or is this impossible?
Normal weakproxy.ref's can be annotated as far as I think using

spam = ReferenceType[Class]

whereas

ham = ProxyType[Class]

does not work. Is one supposed to just

egg = Class

as it is a proxy and should behave the same?

[hatal175]

I believe this can be closed.