gtk:notebook-group-name (object)

object -- a gtk:notebook widget
name -- a string for the group name of the notebook group, or nil to unset it

The accessor for the group-name slot of the gtk:notebook class gets or sets the current group name for the notebook.

Notebooks with the same group name will be able to exchange notebook tabs via drag and drop. A notebook with a nil group name will not be able to exchange notebook tabs with any other notebook.