code: @Override
      public DescribeRepositoriesResult describeRepositories(DescribeRepositoriesRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeRepositories(request);
      }
docs: <p>
  Describes image repositories in a registry.
  </p>
  
  @param describeRepositoriesRequest
  @return Result of the DescribeRepositories operation returned by the service.
  @throws ServerException
  These errors are usually caused by a server-side issue.
  @throws InvalidParameterException
  The specified parameter is invalid. Review the available parameters for the API request.
  @throws RepositoryNotFoundException
  The specified repository could not be found. Check the spelling of the specified repository and ensure
  that you are performing operations on the correct registry.
  @sample AmazonECR.DescribeRepositories
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ecr-2015-09-21/DescribeRepositories" target="_top">AWS API
  Documentation</a>