@Override
  public void toStringClassDetails(final StringBuilder sb) {
    sb.append(getClass().getSimpleName());
    sb.append(", namespace=");
    sb.append(getNamespaceName());
  }
Base class for all the Namespace procedures that want to use a StateMachineProcedure. It provide
some basic helpers like basic locking and basic toStringClassDetails().
hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/AbstractStateMachineNamespaceProcedure.java