code: private ReliabilitySubset createNonPersistentSubset(Reliability reliability)
    {
      if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
        SibTr.entry(
          tc,
          "createNonPersistentSubset",
          new Object[] { reliability });
      
      ReliabilitySubset subset = new ReliabilitySubset(reliability, initialData);
      subsets[getIndex(reliability)] = subset;
      subsetIDs[getIndex(reliability)] = NO_ID;
      
      if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
        SibTr.exit(tc, "createNonPersistentSubset", subset);
      
      return subset;    
    }
docs: Create a new ReliabilitySubset for the given Reliability but do not
  persist it.
  
  @param reliability