func (runner *runner) checkRule(table Table, chain Chain, args ...string) (bool, error) {
	if runner.hasCheck {
		return runner.checkRuleUsingCheck(makeFullArgs(table, chain, args...))
	}
	return runner.checkRuleWithoutCheck(table, chain, args...)
}

var hexnumRE = regexp.MustCompile("0x0+([0-9])")

func trimhex(s string) string {
	return hexnumRE.ReplaceAllString(s, "0x$1")
}

			func(cmd string, args ...string) exec.Cmd { return fakeexec.InitFakeCmd(&fcmd, cmd, args...) },
		},
	}
	runner := &runner{exec: fexec}
	exists, err := runner.checkRuleWithoutCheck(
		TableNAT, ChainPrerouting,
		"-m", "addrtype",
		"-m", "mark", "--mark", "0x4000/0x4000",
		"-j", "DOCKER",
		"--dst-type", "LOCAL")
	if err != nil {
		t.Errorf("expected success, got %v", err)