code: @Override
      public ListResourceDefinitionsResult listResourceDefinitions(ListResourceDefinitionsRequest request) {
          request = beforeClientExecution(request);
          return executeListResourceDefinitions(request);
      }
docs: Retrieves a list of resource definitions.
  
  @param listResourceDefinitionsRequest
  @return Result of the ListResourceDefinitions operation returned by the service.
  @sample AWSGreengrass.ListResourceDefinitions
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/greengrass-2017-06-07/ListResourceDefinitions"
  target="_top">AWS API Documentation</a>