@Override
    protected void toStringState(StringBuilder builder) {
      // Call twice to get the state string twice as our state value.
      super.toStringState(builder);
      super.toStringState(builder);
    }
A do-nothing basic procedure that overrides the toStringState method. It just doubles the
current state string.
hbase-procedure/src/test/java/org/apache/hadoop/hbase/procedure2/TestProcedureToString.java