code: @Override
      public RecoverableUnit lookupRecoverableUnit(long identity) throws LogClosedException {
          if (tc.isEntryEnabled())
              Tr.entry(tc, "lookupRecoverableUnit", new Object[] { Long.valueOf(identity), this });
  
          RecoverableUnit runit = getRecoverableUnit(identity);
  
          if (tc.isEntryEnabled())
              Tr.exit(tc, "lookupRecoverableUnit", runit);
          return runit;
      }
docs: TODO: remove the getRecoverableUnit method ... this is the 'interface' method