Retrieves the [iface@Gtk.ConstraintTarget] used as the target for the constraint.
If the targe is set to NULL at creation, the constraint will use the widget using the [class@Gtk.ConstraintLayout] as the target.
a #GtkConstraintTarget
See Implementation
Retrieves the [iface@Gtk.ConstraintTarget] used as the target for the constraint.
If the targe is set to NULL at creation, the constraint will use the widget using the [class@Gtk.ConstraintLayout] as the target.