@Override
    public String toString() {
      return new ToStringBuilder(this, ToStringStyle.SHORT_PREFIX_STYLE)
        .append("serverName", serverName).append("tableName", tableName)
        .append("regionMetrics", regionMetrics).toString();
    }
POJO carrying detailed information about a region for use in visualizations. Intended to be
serialized to JSON and consumed from JavaScript.
hbase-server/src/main/java/org/apache/hadoop/hbase/master/http/RegionVisualizer.java