@type t() :: %DocuSign.Model.FolderItemsResponse{
  endPosition: String.t() | nil,
  envelopes: [DocuSign.Model.EnvelopeSummary.t()] | nil,
  folders: [DocuSign.Model.Folder.t()] | nil,
  nextUri: String.t() | nil,
  previousUri: String.t() | nil,
  resultSetSize: String.t() | nil,
  startPosition: String.t() | nil,
  totalSetSize: String.t() | nil
}