Gtk.Container.prototype.child_set_property

function child_set_property(child:Gtk.Widget, property_name:String, value:GObject.Value):void {
    // Gjs wrapper for gtk_container_child_set_property()
}

Sets a child property for child and container.

child: a widget which is a child of container
property_name: the name of the property to set
value: the value to set the property to