@type t() :: %Inttegro.UpdateMessageTemplateRequest{
  about: String.t() | nil,
  attachments: [String.t()] | nil,
  channel: Inttegro.MessageTemplateChannel.t() | nil,
  email: Inttegro.MessageTemplateEmailContentInput.t() | nil,
  id: String.t(),
  locale: String.t() | nil,
  name: String.t() | nil,
  purpose: String.t() | nil,
  sms: Inttegro.MessageTemplateSMSContentInput.t() | nil,
  variables: [Inttegro.MessageTemplateVariableInput.t()] | nil
}