@type t() ::
  %Procore.Model.RestV11ProjectsProjectIdSubmittalsPost201ResponseAllOfSubmittalPackage{
    attachments:
      [
        Procore.Model.RestV10WorkOrderContractsPost201ResponseAttachmentsInner.t()
      ]
      | nil,
    attachments_count: integer() | nil,
    created_by:
      Procore.Model.RestV10TaskItemsGet200ResponseInnerAllOfAssignee.t() | nil,
    description: String.t() | nil,
    id: integer() | nil,
    number: String.t() | nil,
    submittal_ids: [integer()] | nil,
    title: String.t() | nil
  }