FluentDOM\Loader\Options::executeCallback PHP Метод

    private function executeCallback($name, $default, ...$arguments)
    {
        if (array_key_exists($name, $this->_callbacks)) {
            $callback = $this->_callbacks[$name];
            if (is_callable($callback)) {
                return $callback(...$arguments);
            } else {
                return $default;
            }
        } else {
            throw new \InvalidArgumentException(sprintf('Unknown callback specifier "%s".', $name));
        }
    }