No easy way to convert Python objects to java.lang.Object

[mhsmith]

This was a deliberate choice in p2j ("because allowing conversion to Object could cause excessive ambiguity in overload resolution"), but maybe we need to revisit that choice, because it makes it impossible to pass Python objects to methods that take Object-type arguments. Off the top of my head, even I can't come up with a workaround, so what chance does a user have?

This even applies to PyObject.fromJava(Object), and even if we provided a PyObject overload for it, the conversion functions actively try not to expose PyObject proxies within Python, instead returning the original Python object.