@type t() :: %Spatio.Model.UpdateDraftRequest{
  accountId: String.t() | nil,
  attachments: [Spatio.Model.AttachmentInput.t()] | nil,
  bcc: [String.t()] | nil,
  body: String.t() | nil,
  cc: [String.t()] | nil,
  html: boolean() | nil,
  subject: String.t() | nil,
  to: [String.t()] | nil
}