HashSet<RegionInfo> getOnlineRegionInfos(List<? extends Region> onlineRegions) {
    HashSet<RegionInfo> regionInfos = new HashSet<>();
    onlineRegions.forEach((region) -> regionInfos.add(region.getRegionInfo()));
    return regionInfos;
  }
A Chore which sends the region size reports on this RegionServer to the Master.
hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/RegionSizeReportingChore.java