AvailabilityRules
public AvailabilityRules AvailabilityRules( @Json(name = "availability_method") AvailabilityMethod availabilityMethod, @Json(name = "meeting_buffer") MeetingBuffer buffer, @Json(name = "default_open_hours") List<OpenHours> defaultOpenHours, @Json(name = "round_robin_event_id") String roundRobinEventId)