code: public void finish() {
          if (logListenerCommandShell != null) {
              logListenerCommandShell.cancel();
          }
          for (ScreenshotProcessor screenshotProcessor : processors) {
              screenshotProcessor.finish();
          }
      }
docs: Stop receiving and acting on paparazzo requests.
  <p/>
  This class is not re-usable after finish() is called.