private function registerStreams()
    {
        foreach ($this->_streamWrappers as $wrappers) {
            foreach ($wrappers as $wrapper) {
                if (false === in_array($wrapper['protocol'], $this->_availableWrappers)) {
                    stream_wrapper_register($wrapper['protocol'], $wrapper['classname']);
                    $this->_availableWrappers = stream_get_wrappers();
                }
            }
        }
    }