[Vala] PolicyKit vapi for Vala?

[PCMan <pcman tw gmail com>]

Hi all,
Another question, does anyone have a vapi file for Policykit?
I tried to generate one with vala-gen-introspect according to vala
tutorial but failed.
Running vala-gen-introspect results in error messages + crashes.
Have anyone tried this?
As policykit is used more and more in conjunction with dbus, this is a
must-have for vala.
Vala has perfect dbus support. So if vala has vapi for policykit, this
can greatly facilitate the utilization of dbus and policykit.