private Object getRegionObject(TXRegionLockRequestImpl lr) {
    if (local) {
      return lr.getLocalRegion();
    } else {
      return lr.getRegionFullPath();
    }
  }
keys are LocalRegion; values are ArrayList of Sets of held locks.
geode-core/src/main/java/org/apache/geode/internal/cache/TXReservationMgr.java