private void runWithIndexUpdatingInProgress(Runnable r) {
    notifyIndex(true);
    try {
      r.run();
    } finally {
      notifyIndex(false);
    }
  }
@return false if caller should retry because entry is no longer in the map
geode-core/src/main/java/org/apache/geode/internal/cache/map/AbstractRegionMapPut.java