pkg strconv, var ErrRange error
pkg strconv, var ErrSyntax error
pkg strings, func Contains(string, string) bool
pkg strings, func ContainsAny(string, string) bool
pkg strings, func ContainsRune(string, int32) bool
pkg strings, func Count(string, string) int
pkg strings, func EqualFold(string, string) bool
pkg strings, func Fields(string) []string
pkg strings, func FieldsFunc(string, func(int32) bool) []string