public boolean hasReferences() throws IOException {
    Path storeDir = ctx.getRegionFileSystem().getStoreDir(ctx.getFamily().getNameAsString());
    FileStatus[] files =
      CommonFSUtils.listStatus(ctx.getRegionFileSystem().getFileSystem(), storeDir);
    if (files != null) {
      for (FileStatus stat : files) {
        if (stat.isDirectory()) {
          continue;
        }
        if (StoreFileInfo.isReference(stat.getPath())) {
          LOG.trace("Reference {}", stat.getPath());
          return true;
        }
      }
    }
    return false;
  }
Returns true if the specified family has reference files
@param familyName Column Family Name
@return true if family contains reference files
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/storefiletracker/StoreFileTrackerBase.java