UserModel::createFromId

static function createFromId(int $userId): AccessibleUser
{
	$key = 'USER_'.static::class.'_'.$userId;
	if (!array_key_exists($key, static::$cache))
	{
		$model = new static();
		$model->setUserId($userId);
		static::$cache[$key] = $model;
	}
	return static::$cache[$key];
}