@type t() ::
  %Procore.Model.RestV11ProjectsProjectIdSubmittalsGet200ResponseInnerApproversInnerAssociatedAttachmentsInner{
    additional_page_count: integer() | nil,
    attached_at: DateTime.t() | nil,
    attachment_id: integer() | nil,
    content_type: String.t() | nil,
    document_markup_layer_id: integer() | nil,
    filename: String.t() | nil,
    id: integer() | nil,
    markup_updated_at: DateTime.t() | nil,
    state: String.t() | nil,
    updated_at: DateTime.t() | nil,
    url: String.t() | nil,
    version_timestamp: DateTime.t() | nil
  }