code: public void onCapture(@Nullable Bitmap screenshot, @NonNull BitmapProcessorListener listener) {
      listener.onBitmapReady(screenshot);
    }
docs: Called when a capture is triggered but not yet saved to a {@link File}, enabling additional
  processing before saving. The default implementation immediately calls the {@code listener}
  with the original screenshot.
  
  @param screenshot A reference to the screenshot that was captured. Can be null if screenshots
  were disabled.
  @param listener callback for when additional processing has been completed. This listener must
  be called for the screenshot to be saved to disk.