Gtk.Buildable.prototype.get_internal_child
function get_internal_child(builder:Gtk.Builder, childname:String):GObject.Object {
    // Gjs wrapper for gtk_buildable_get_internal_child()
}Get the internal child called childname of the buildable object.
Since 2.12
- builder
- childname
- name of child 
- Returns
- the internal child of the buildable object