type requestReceivedTimestampKeyType … const requestReceivedTimestampKey … // WithReceivedTimestamp returns a copy of parent context in which the ReceivedTimestamp // (the time the request reached the apiserver) is set. // // If the specified ReceivedTimestamp is zero, no value is set and the parent context is returned as is. func WithReceivedTimestamp(parent context.Context, receivedTimestamp time.Time) context.Context { … } // ReceivedTimestampFrom returns the value of the ReceivedTimestamp key from the specified context. func ReceivedTimestampFrom(ctx context.Context) (time.Time, bool) { … }