Gtk.Buildable::custom_tag_start

function vfunc_custom_tag_start(builder:Gtk.Builder, child:GObject.Object, tagname:String):Boolean {
}

This is called for each unknown element under <child>.

Since 2.12

builder

a Gtk.Builder used to construct this object

child

child object or null for non-child tags

tagname

name of tag

Returns

true if a object has a custom implementation, false if it doesn't.