code: public void getTraceSummaryLine(StringBuilder buff) {
      // Need to trim the control message name, as many contain space padding
      buff.append(getControlMessageType().toString().trim());
      // Display the bit flags in hex form
      buff.append(":flags=0x");
      buff.append(Integer.toHexString(getFlags() & 0xff));
    }
docs: Get the common prefix for all control message summary lines