@Override
  public void toStringClassDetails(StringBuilder sb) {
    super.toStringClassDetails(sb);
    sb.append(", server=").append(this.hostingServer);
  }
Returns If true, we will re-wake up this procedure; if false, the procedure stays suspended.
hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/UnassignProcedure.java