sub handle_widget_insertion_events($) {
        my ($widget) = @_;
        for my $property ($widget->get_properties) {
            my $handlers = $property_type_events{ ref($property) };
            next unless $handlers;
            for my $handler (@$handlers) {
                my $rc = $handler->( "pass trigger args here" );
                # do something with result code $rc
            }
        }
    }