gir1.2-muffin-3.0 1.1.1-1 (amd64 binary) in ubuntu raring

 Muffin is a small window manager performing compositing as well based on
 GTK+ and Clutter and used in desktop environment such as Cinnamon.
 .
 It is fairly extensible by the mean of plugins, providing new or customized
 visual effects as well as a flexibility in the behavior of the window
 manager.
 .
 This package contains the GObject introspection data which may be
 used to generate dynamic bindings.