src/Psr16Manager.php
public function debug($debug = null)
    {
        if (!is_null($debug)) {
            $this->_debug = (bool) $debug;
        }

        return $this->_debug;
    }
public function debug($debug = null)
    {
        if (!is_null($debug)) {
            $this->_debug = (bool) $debug;
        }

        return $this->_debug;
    }
设置调试状态

@param bool $debug 是否调试

@return bool