kubernetes/staging/src/k8s.io/client-go/tools/clientcmd/helpers.go

// ParseTimeout returns a parsed duration from a string
// A duration string value must be a positive integer, optionally followed by a corresponding time unit (s|m|h).
func ParseTimeout(duration string) (time.Duration, error) { … }

func parseProxyURL(proxyURL string) (*url.URL, error) { … }