public void register(GridCacheTtlManager mgr){
synchronized (mux) {
    if (cleanupWorker == null)     startCleanupWorker();
    mgrs.add(mgr);
  }
}

public void register ( GridCacheTtlManager mgr ) { synchronized ( mux ) { if ( cleanupWorker == null ) startCleanupWorker ( ) ; mgrs . add ( mgr ) ; } }
register ttl manager of cache for periodical check on expired entries .
