code: @Override
      public ListPlaybackConfigurationsResult listPlaybackConfigurations(ListPlaybackConfigurationsRequest request) {
          request = beforeClientExecution(request);
          return executeListPlaybackConfigurations(request);
      }
docs: <p>
  Returns a list of the playback configurations defined in AWS Elemental MediaTailor. You can specify a maximum
  number of configurations to return at a time. The default maximum is 50. Results are returned in pagefuls. If
  MediaTailor has more configurations than the specified maximum, it provides parameters in the response that you
  can use to retrieve the next pageful.
  </p>
  
  @param listPlaybackConfigurationsRequest
  @return Result of the ListPlaybackConfigurations operation returned by the service.
  @sample AWSMediaTailor.ListPlaybackConfigurations
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/mediatailor-2018-04-23/ListPlaybackConfigurations"
  target="_top">AWS API Documentation</a>