toolbar.php

См. документацию.

<?php
 
namespace Bitrix\UI\Toolbar\Facade;
 
use Bitrix\UI\Toolbar\ButtonLocation;
use Bitrix\UI\Toolbar\Manager;

final class Toolbar
{
    const DEFAULT_ID = 'default-toolbar';
 
    public static function __callStatic($name, $arguments)
    {
        $manager = Manager::getInstance();
        $toolbar = $manager->getToolbarById(self::DEFAULT_ID)?: $manager->createToolbar(self::DEFAULT_ID, []);
        if (!$toolbar)
        {
            //or exception?
            return null;
        }
 
        return call_user_func_array([$toolbar, $name], $arguments);
    }
}