Adding menu to admin menu bar

Iam using WordPress for my blog website,

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function parent_menu_item()
    {
        global $wp_admin_bar;

        // Parent
        $wp_admin_bar->add_menu(
            array(
                 'id'       => 'parent_id_name'
                ,'title'    => __( 'Parent Title', 'your_textdomain' )
                ,'href'     => '#'
            )
        );
            // Link to dev mode admin page
            $wp_admin_bar->add_menu(
                array(
                     'parent'   => 'parent_id_name'
                    ,'id'           => 'child_id_name'
                    ,'title'    => __( 'Child title', 'your_textdomain' )
                    ,'href'     => '#'
                )
            );
    }
    add_action( 'add_admin_bar_menus', 'parent_menu_item', 10 );

Above is correct way to add admin bar ?

Thanks, Advance

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