User defined method handle

[Rémi Forax]

Hi all,
It seems it's currently impossible to create a user defined method handle
because the constructor of MethodHandle take a token (Token)
which is not accessible to user code.

I remember it was a requirement, is this change ?

Also I don't understand why MethodHandle inherits from MethodHandleImpl,
it should be the inverse. MethodHandle should be the base class
and MethodHandleImpl a subclass for VM method handles.

cheers,
Rémi