ParamSpecKwargs

The kwargs for a ParamSpec object.

Given a ParamSpec object P, P.kwargs is an instance of ParamSpecKwargs.

ParamSpecKwargs objects have a reference back to their ParamSpec::

    >>> P = ParamSpec("P")
    >>> P.kwargs.__origin__ is P
    True

This type is meant for runtime introspection and has no special meaning
to static type checkers.