string
? event_id) throws PropertyError
Change the contact's birthday event ID.
It's preferred to call this rather than setting BirthdayDetails.calendar_event_id directly, as this method gives error notification and will only return once the event has been written to the relevant backing store (or the operation's failed).
event_id | the new birthday event ID (or `null` to unset the event ID) |
PropertyError | if setting the birthday event ID failed |
0.6.2