Retrieves the gtk.constraint_target.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 gtk.constraint_layout.ConstraintLayout as the target.
a gtk.constraint_target.ConstraintTarget
Retrieves the gtk.constraint_target.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 gtk.constraint_layout.ConstraintLayout as the target.