Wanted: adding a new widget class for lablgtk3 mini tutorial

I need to take advantage of the GtkHeaderBar functionalities and compact window layout in a GUI project.
I have spare time to tackle the issue, but lack somewhat of programming experience, especially about lablgtk autogeneration of bindings.
Does someone on the list plan to add GtkHeaderBar to lablgtk3?
Even better, anyone willing to write a mini tuto (a long email) about adding a new gtk+3 widget to lablgtk3?