add_constraint

Description:

public void add_constraint (owned Constraint constraint)

Adds a constraint to the layout manager.

The [property@Gtk.Constraint:source] and [property@Gtk.Constraint:target] properties of `constraint` can be:

set to `NULL` to indicate that the constraint refers to the widget using `layout`
set to the [class@Gtk.Widget] using `layout`
set to a child of the [class@Gtk.Widget] using `layout`
set to a [class@Gtk.ConstraintGuide] that is part of `layout`

The this acquires the ownership of constraint after calling this function.

this	a `GtkConstraintLayout`
constraint	a [class@Gtk.Constraint]