code: @Override
      public DescribeRootFoldersResult describeRootFolders(DescribeRootFoldersRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeRootFolders(request);
      }
docs: <p>
  Describes the current user's special folders; the <code>RootFolder</code> and the <code>RecycleBin</code>.
  <code>RootFolder</code> is the root of user's files and folders and <code>RecycleBin</code> is the root of
  recycled items. This is not a valid action for SigV4 (administrative API) clients.
  </p>
  <p>
  This action requires an authentication token. To get an authentication token, register an application with Amazon
  WorkDocs. For more information, see <a
  href="https://docs.aws.amazon.com/workdocs/latest/developerguide/wd-auth-user.html">Authentication and Access
  Control for User Applications</a> in the <i>Amazon WorkDocs Developer Guide</i>.
  </p>
  
  @param describeRootFoldersRequest
  @return Result of the DescribeRootFolders operation returned by the service.
  @throws UnauthorizedOperationException
  The operation is not permitted.
  @throws UnauthorizedResourceAccessException
  The caller does not have access to perform the action on the resource.
  @throws InvalidArgumentException
  The pagination marker or limit fields are not valid.
  @throws FailedDependencyException
  The AWS Directory Service cannot reach an on-premises instance. Or a dependency under the control of the
  organization is failing, such as a connected Active Directory.
  @throws ServiceUnavailableException
  One or more of the dependencies is unavailable.
  @sample AmazonWorkDocs.DescribeRootFolders
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/workdocs-2016-05-01/DescribeRootFolders" target="_top">AWS
  API Documentation</a>