retrieveScheduledEventByIdOrNull
suspend fun Guild.retrieveScheduledEventByIdOrNull(id: Long, useCache: Boolean = true): ScheduledEvent?(source)
suspend fun Guild.retrieveScheduledEventByIdOrNull(id: String, useCache: Boolean = true): ScheduledEvent?(source)
Same as Guild.retrieveScheduledEventById, but returns null on ErrorResponse.UNKNOWN_SCHEDULED_EVENT.