public boolean waitForInvocation(int timeoutMs) {
    return waitForInvocation(timeoutMs, 200);
  }
Returns whether or not one of this <code>CacheListener</code> methods was invoked. Before
returning, the <code>invoked</code> flag is cleared.

@return whether one of this <code>CacheListener</code> methods was invoked
geode-dunit/src/main/java/org/apache/geode/cache30/TestCacheCallback.java