code: protected long getPersistentData(int priority, Reliability reliability) throws SIResourceException
    {
      if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
        SibTr.entry(
          tc,
          "getPersistentData",
          new Object[] { new Integer(priority), reliability });
  
      long prefix = getSubset(reliability).getPersistentData(priority);
          
      if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
        SibTr.exit(tc, "getPersistentData", new Long(prefix));
        
      return prefix;
    }
docs: Get the persistent data for a specific stream
  
  @param priority
  @param reliability
  @throws SIResourceException