public void removeTimer(String eventName) {
        synchronized (mTrackTimer) {
            mTrackTimer.remove(eventName);
        }
    }
@Test
    public void removeTimer() {
        mInstance.addEventTimer("EventTimer", new EventTimer(TimeUnit.SECONDS, 10000L));
        mInstance.removeTimer("EventTimer");
        Assert.assertNull(mInstance.getEventTimer("EventTimer"));
    }