docs: public Waiter<DescribeSnapshotsRequest> snapshotCompleted() {
  
          return new WaiterBuilder<DescribeSnapshotsRequest, DescribeSnapshotsResult>().withSdkFunction(new DescribeSnapshotsFunction(client))
                  .withAcceptors(new SnapshotCompleted.IsCompletedMatcher())
                  .withDefaultPollingStrategy(new PollingStrategy(new MaxAttemptsRetryStrategy(40), new FixedDelayStrategy(15)))
                  .withExecutorService(executorService).build();
      }