kubernetes/vendor/google.golang.org/grpc/internal/serviceconfig/duration.go

type Duration …

func (d Duration) String() string { … }

// MarshalJSON converts from d to a JSON string output.
func (d Duration) MarshalJSON() ([]byte, error) { … }

// UnmarshalJSON unmarshals b as a duration JSON string into d.
func (d *Duration) UnmarshalJSON(b []byte) error { … }