code: func RegisterFlags() {
  	fmt.Println("Registering flags...")
  	flag.StringVar(&testFlagString, "ep-string", "my-value",
  		"Example of a string flag.")
  	flag.IntVar(&testFlagInt, "ep-int", 1122,
  		"Example of an int flag.")
  	flag.Int64Var(&testFlagInt64, "ep-int64", -3344,
  		"Example of an int64 flag.")
  	flag.UintVar(&testFlagUint, "ep-uint", 5566,
  		"Example of a uint flag.")
  	flag.Uint64Var(&testFlagUint64, "ep-uint64", 7788,
  		"Example of a uint64 flag.")
  	flag.BoolVar(&testFlagBool, "ep-bool", true,
  		"Example of a bool flag.")
  	flag.DurationVar(&testFlagDur, "ep-duration", time.Second*5,
  		"Example of a duration flag.")
  }
docs: // RegisterFlags contains examples of how to register flags of various types.