public function __clone() {
$this->exitcode = null;
$this->fallbackExitcode = null;
$this->processInformation = null;
$this->stdout = null;
$this->stderr = null;
$this->pipes = null;
$this->process = null;
$this->status = self::STATUS_READY;
$this->fileHandles = null;
$this->readBytes = null;
}