seregazhuk\PinterestBot\Api\ProvidersContainer::resolveProviderClass PHP Метод

    protected function resolveProviderClass($provider)
    {
        $className = self::PROVIDERS_NAMESPACE . ucfirst($provider);
        if (!class_exists($className)) {
            throw new WrongProvider("Provider {$className} not found.");
        }
        return $className;
    }