NewSet creates a new flag set.

NewSets creates a new flag sets.

-- BoolVar and boolValue.

-- DurationVar and durationValue.

-- EnumVar and enumValue.

-- EnumVar and enumValue.

-- Float64Var and float64Value.

-- Int64Var and int64Value.

-- IntVar and intValue.

Set is a grouped wrapper around a real flag set and a grouped flag set.

Sets is a group of flag sets.

-- StringMapVar and stringMapValue.

-- StringSliceVar and stringSliceValue.

-- StringVar and stringValue.

-- Uint64Var and uint64Value.

-- UintVar && uintValue.

-- VarFlag.

FlagExample is an interface which declares an example value.

FlagVisibility is an interface which declares whether a flag should be hidden from help and completions.