public List<HbckOrphanRegionsOnRS> gethbckOrphanRegionsOnRs() {
    return hbckOrphanRegionsOnRs;
  }
This class exposes hbck.jsp report as JSON Output via /hbck/hbck-metrics API.
hbase-server/src/main/java/org/apache/hadoop/hbase/master/http/hbck/model/HbckMetrics.java