code: @Override
      public ListDistributionsResult listDistributions(ListDistributionsRequest request) {
          request = beforeClientExecution(request);
          return executeListDistributions(request);
      }
docs: <p>
  List distributions.
  </p>
  
  @param listDistributionsRequest
  The request to list your distributions.
  @return Result of the ListDistributions operation returned by the service.
  @throws InvalidArgumentException
  The argument is invalid.
  @sample AmazonCloudFront.ListDistributions
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/cloudfront-2018-11-05/ListDistributions" target="_top">AWS
  API Documentation</a>