@type t() :: %LINE.Bot.MessagingApi.Model.PostbackAction{
  data: String.t() | nil,
  displayText: String.t() | nil,
  fillInText: String.t() | nil,
  inputOption: String.t() | nil,
  label: String.t() | nil,
  text: String.t() | nil,
  type: String.t() | nil
}