@type t() :: %ExNylas.AvailabilityRules.Build{
  availability_method:
    (:collective | :"max-fairness" | :"max-availability") | nil,
  buffer: ExNylas.Buffer.Build.t() | nil,
  default_open_hours: [ExNylas.OpenHours.Build.t()],
  round_robin_group_id: String.t() | nil
}