docs: public void toggleFlashMode() {
          String otherFlashMode = "";
          if (mCurrentFlash.equals(Parameters.FLASH_MODE_TORCH)) {
              otherFlashMode = Parameters.FLASH_MODE_OFF;
          } else {
              otherFlashMode = Parameters.FLASH_MODE_TORCH;
          }
          requestFlash(otherFlashMode);
      }