@type t() :: %MailSlurpAPI.Model.Complaint{
  complaintRecipient: String.t(),
  createdAt: DateTime.t(),
  eventType: String.t() | nil,
  id: String.t(),
  mailMessageId: String.t() | nil,
  mailSource: String.t() | nil,
  updatedAt: DateTime.t(),
  userId: String.t() | nil
}