public static void regionLocked(InternalDistributedMember locker, String regionPath,
      DistributedRegion region) {
    lockedRegions.put(new LockKey(locker, regionPath), region);
  }
A map of all the regions that are currently locked for a clear in this VM
geode-core/src/main/java/org/apache/geode/internal/cache/DistributedClearOperation.java