docs: public Waiter<DescribeDataSourcesRequest> dataSourceAvailable() {
  
          return new WaiterBuilder<DescribeDataSourcesRequest, DescribeDataSourcesResult>().withSdkFunction(new DescribeDataSourcesFunction(client))
                  .withAcceptors(new DataSourceAvailable.IsCOMPLETEDMatcher(), new DataSourceAvailable.IsFAILEDMatcher())
                  .withDefaultPollingStrategy(new PollingStrategy(new MaxAttemptsRetryStrategy(60), new FixedDelayStrategy(30)))
                  .withExecutorService(executorService).build();
      }