src/Leevel/Session/Session.php
public function flashs(array $flash): void
    {
        foreach ($flash as $key => $value) {
            $this->flash($key, $value);
        }
    }
public function flashs(array $flash): void
    {
        foreach ($flash as $key => $value) {
            $this->flash($key, $value);
        }
    }
批量闪存数据，当前请求和下一个请求可用.

@param array $flash