public static function register()
{
self::$root = null;
self::$quota = Quota::unlimited();
if (true === self::$registered) {
return;
}
if (@stream_wrapper_register(vfsStream::SCHEME, __CLASS__) === false) {
throw new vfsStreamException('A handler has already been registered for the ' . vfsStream::SCHEME . ' protocol.');
}
self::$registered = true;
}