GNOME introspection library for budgie-desktop (raven)

 Budgie-Desktop is a GTK+ based desktop environment which focuses on
 simplicity and elegance. It provides a traditional desktop metaphor
 based interface utilising customisable panel based menu driven system.
 Budgie-Desktop is written from scratch utilising many GNOME based
 sub-systems such as GNOME-Session and Mutter.
 .
 This is the introspection library and allows creating plugins in
 python3, C and Vala for the raven sidebar