code: public void doShutdown(boolean isSQLRecoveryLog) {
          if (tc.isEntryEnabled())
              Tr.entry(tc, "doShutdown with flag: " + isSQLRecoveryLog);
  
          if (isSQLRecoveryLog) {
              try {
                  TMHelper.shutdown();
              } catch (Exception e) {
                  FFDCFilter.processException(e, "com.ibm.ws.transaction.services.TransactionManagerService.doShutdown", "60", this);
              }
          }
          if (tc.isEntryEnabled())
              Tr.exit(tc, "doShutdown");
      }
docs: This method will shutdown log recovery processing if we are working with transaction logs stored in
  an RDBMS.
  
  @param cp