@type t() ::
  %Procore.Model.RestV11ProjectsProjectIdSubmittalsIdWorkflowDataGet200ResponseAttachmentsInner{
    approver_id: integer() | nil,
    approver_marked_up_at: String.t() | nil,
    can_carry_forward: boolean() | nil,
    download_url: String.t() | nil,
    has_failed: boolean() | nil,
    id: integer() | nil,
    is_originating_attachment: boolean() | nil,
    is_processing: boolean() | nil,
    last_marked_up_at: String.t() | nil,
    last_marked_up_by: String.t() | nil,
    name: String.t() | nil,
    viewer_type: String.t() | nil,
    viewer_url: String.t() | nil
  }