gtk:header-bar-child-pack-type (container child)

container -- a gtk:header-bar widget
child -- a gtk:widget child widget
packtype -- a value of the gtk:pack-type enumeration for the child widget

Accessor of the pack-type child property of the gtk:header-bar class. A value of the gtk:pack-type enumeration indicating whether the child widget is packed with reference to the start or end of the parent.