return c.sessionTicketKeys
	}
	// Fast path for the common case where the key is fresh enough.
	if len(c.autoSessionTicketKeys) > 0 && c.time().Sub(c.autoSessionTicketKeys[0].created) < ticketKeyRotation {
		return c.autoSessionTicketKeys
	}

	// autoSessionTicketKeys are managed by auto-rotation.
	c.mutex.RUnlock()
	defer c.mutex.RLock()
	c.mutex.Lock()
	defer c.mutex.Unlock()

			f.Set(reflect.ValueOf([]byte{'x'}))
		case "mutex", "autoSessionTicketKeys", "sessionTicketKeys":
			continue // these are unexported fields that are handled separately
		default:
			t.Errorf("all fields must be accounted for, but saw unknown field %q", fn)
		}
	}
	// Set the unexported fields related to session ticket keys, which are copied with Clone().
	c1.autoSessionTicketKeys = []ticketKey{c1.ticketKeyFromBytes(c1.SessionTicketKey)}