ManaPHP\Mvc\View\Flash\Adapter\Session::__construct PHP Method

    public function __construct($cssClasses = [])
    {
        parent::__construct($cssClasses);
        $defaultMessages = [];
        $this->_messages = (array) $this->session->get($this->_sessionKey, $defaultMessages);
        $this->session->remove($this->_sessionKey);
    }