func DurationSlice(name string, defaultVal []time.Duration, usage string) *[]time.Duration
DurationSlice returns a flag representing a slice of time.Duration objects.
func IntSlice(name string, defaultVal []int, usage string) *[]int
IntSlice returns a flag representing a slice of ints.
func StringSlice(name string, defaultVal []string, usage string) *[]string
StringSlice returns a flag representing a slice of strings.
func StringWithAllowedValues(name, defaultVal, usage string, allowed []string) *string
StringWithAllowedValues returns a flag variable of type stringFlagWithAllowedValues configured with the provided parameters. 'allowed` is the set of values that this flag can be set to.