code: @Override
      public DescribeFolderContentsResult describeFolderContents(DescribeFolderContentsRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeFolderContents(request);
      }
docs: <p>
  Describes the contents of the specified folder, including its documents and subfolders.
  </p>
  <p>
  By default, Amazon WorkDocs returns the first 100 active document and folder metadata items. If there are more
  results, the response includes a marker that you can use to request the next set of results. You can also request
  initialized documents.
  </p>
  
  @param describeFolderContentsRequest
  @return Result of the DescribeFolderContents operation returned by the service.
  @throws EntityNotExistsException
  The resource does not exist.
  @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.
  @throws ProhibitedStateException
  The specified document version is not in the INITIALIZED state.
  @sample AmazonWorkDocs.DescribeFolderContents
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/workdocs-2016-05-01/DescribeFolderContents"
  target="_top">AWS API Documentation</a>