code: boolean containsClose() {
          synchronized (reqQueueLockObject) {
              for (ServerRequest req : queue) {
                  if (req != null &&
                          req.getRequestPath().equals(Defines.RequestPath.RegisterClose.getPath())) {
                      return true;
                  }
              }
          }
          return false;
      }
docs: <p>Determines whether the queue contains a session/app close request.</p>
  
  @return A {@link Boolean} value indicating whether or not the queue contains a
  session close request. <i>True</i> if the queue contains a close request,
  <i>False</i> if not.