Stecman\Component\Symfony\Console\BashCompletion\CompletionHandler::addHandler PHP Метод

    public function addHandler(CompletionInterface $helper)
    {
        $this->helpers[] = $helper;
    }

 protected function configureCompletion(CompletionHandler $handler)
 {
     // Completion for plugin argument/option to file system paths.
     $handler->addHandler(new ShellPathCompletion(Completion::ALL_COMMANDS, 'plugin', Completion::ALL_TYPES));
     // Completion for moodle option to file system paths.
     $handler->addHandler(new ShellPathCompletion(Completion::ALL_COMMANDS, 'moodle', Completion::TYPE_OPTION));
 }