code: @Override
      public CreateSubscriptionDefinitionResult createSubscriptionDefinition(CreateSubscriptionDefinitionRequest request) {
          request = beforeClientExecution(request);
          return executeCreateSubscriptionDefinition(request);
      }
docs: Creates a subscription definition. You may provide the initial version of the subscription definition now or use
  ''CreateSubscriptionDefinitionVersion'' at a later time.
  
  @param createSubscriptionDefinitionRequest
  @return Result of the CreateSubscriptionDefinition operation returned by the service.
  @throws BadRequestException
  invalid request
  @sample AWSGreengrass.CreateSubscriptionDefinition
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/greengrass-2017-06-07/CreateSubscriptionDefinition"
  target="_top">AWS API Documentation</a>