docs: protected void waitFor(final int millis) {
  		synchronized (mLock) {
  			try {
  				sendLogBroadcast(DfuBaseService.LOG_LEVEL_DEBUG, "wait(" + millis + ")");
  				mLock.wait(millis);
  			} catch (final InterruptedException e) {
  				loge("Sleeping interrupted", e);
  			}
  		}
  	}