code: public static void addTxn(TransactionImpl txn)
      {
          if (tc.isEntryEnabled()) Tr.entry(tc, "addTxn", txn);
  
          final ByteArray key = new ByteArray(txn.getXid().getGlobalTransactionId());
  
          synchronized (txnTable)
          {
              if (!txnTable.containsKey(key))
              {
                  txnTable.put(key, new JCATranWrapperImpl(txn, true, false)); // @LIDB2110C
              }
          }
  
          if (tc.isEntryEnabled()) Tr.exit(tc, "addTxn");
      }
docs: To be called by recovery manager
  @param txn