Gtk.Window:attached-to
"attached-to" Gtk.Widget : Read / Write / Construct
The widget to which this window is attached. See Gtk.Window.prototype.set_attached_to.
Examples of places where specifying this relation is useful are for instance a Gtk.Menu created by a Gtk.ComboBox, a completion popup window created by Gtk.Entry or a typeahead search entry created by Gtk.TreeView.
Since 3.4