private IndexManager getInitializedIndexManager() {
    final IndexManager oqlIndexManager = getOwner().getIndexManager();
    if (oqlIndexManager != null) {
      oqlIndexManager.waitForIndexInit();
    }
    return oqlIndexManager;
  }
@return regionEntry if put completed, otherwise null.
geode-core/src/main/java/org/apache/geode/internal/cache/map/AbstractRegionMapPut.java