Assert\Assertion::interfaceExists PHP Метод

    public static function interfaceExists($value, $message = null, $propertyPath = null)
    {
        if (!interface_exists($value)) {
            $message = sprintf($message ?: 'Interface "%s" does not exist.', static::stringify($value));
            throw static::createException($value, $message, static::INVALID_INTERFACE, $propertyPath);
        }
        return true;
    }