@type t() :: %LINE.Bot.MessagingApi.Model.NarrowcastRequest{
  filter: LINE.Bot.Model.Filter.t() | nil,
  limit: LINE.Bot.Model.Limit.t() | nil,
  messages: [LINE.Bot.Model.Message.t()],
  notificationDisabled: boolean() | nil,
  recipient: LINE.Bot.Model.Recipient.t() | nil
}