code: @Override
      public StartCrawlerResult startCrawler(StartCrawlerRequest request) {
          request = beforeClientExecution(request);
          return executeStartCrawler(request);
      }
docs: <p>
  Starts a crawl using the specified crawler, regardless of what is scheduled. If the crawler is already running,
  returns a <a href=
  "https://docs.aws.amazon.com/glue/latest/dg/aws-glue-api-exceptions.html#aws-glue-api-exceptions-CrawlerRunningException"
  >CrawlerRunningException</a>.
  </p>
  
  @param startCrawlerRequest
  @return Result of the StartCrawler operation returned by the service.
  @throws EntityNotFoundException
  A specified entity does not exist
  @throws CrawlerRunningException
  The operation cannot be performed because the crawler is already running.
  @throws OperationTimeoutException
  The operation timed out.
  @sample AWSGlue.StartCrawler
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/glue-2017-03-31/StartCrawler" target="_top">AWS API
  Documentation</a>