code: public static void traceSetTxCommon(int opType, String txId, String desc)
      {
          if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled())
          {
              StringBuffer sbuf = new StringBuffer();
  
              sbuf
                              .append(TxLifeCycle_Set_Tx_Type_Str).append(DataDelimiter)
                              .append(TxLifeCycle_Set_Tx_Type).append(DataDelimiter)
                              .append(opType).append(DataDelimiter)
                              .append(txId).append(DataDelimiter)
                              .append(desc);
              Tr.debug(tc, sbuf.toString());
          }
      }
docs: This is called by the EJB container server code to write a
  set transaction record to the trace log, if enabled.