.addValue(3.14d)
            .add(LONG_NAME, false)
            .add(LONG_NAME, LONG_NAME);
      }
    },
    CONDITIONAL {
      @Override
      void addEntries(MoreObjects.ToStringHelper helper) {
        helper
            .add(SHORT_NAME, "x")
            .add(LONG_NAME, "y")
            .add(SHORT_NAME, null)
            .add(LONG_NAME, null)
            .addValue("z")
            .addValue("")

            .addValue(3.14d)
            .add(LONG_NAME, false)
            .add(LONG_NAME, LONG_NAME);
      }
    },
    CONDITIONAL {
      @Override
      void addEntries(MoreObjects.ToStringHelper helper) {
        helper
            .add(SHORT_NAME, "x")
            .add(LONG_NAME, "y")
            .add(SHORT_NAME, null)
            .add(LONG_NAME, null)
            .addValue("z")
            .addValue("")

		return err.Error()
	}
	exitcode := ee.ExitCode()
	if errtypeStr, ok := exittypeToString[XTablesExittype(exitcode)]; ok {
		// The original stderr is something like:
		// `prog_name + prog_vers: error hints`
		// `(optional) try help information`.
		// e.g.,
		// `iptables 1.8.4 (legacy): Couldn't load target 'ISTIO_OUTPUT':No such file or directory`