code: func refuseArgs(command string, args []string) {
  	for _, arg := range args {
  		if arg == command || strings.HasPrefix(arg, "-") {
  			continue
  		} else {
  			utils.FatalError(trace.BadParameter("unexpected argument: %s", arg))
  		}
  
  	}
  }
docs: // refuseArgs helper makes sure that 'args' (list of CLI arguments)
  // does not contain anything other than command