code: public boolean deleteSinkAsync(String sinkName) throws ExecutionException, InterruptedException {
      // [START deleteSinkAsync]
      Future<Boolean> future = logging.deleteSinkAsync(sinkName);
      // ...
      boolean deleted = future.get();
      if (deleted) {
        // the sink was deleted
      } else {
        // the sink was not found
      }
      // [END deleteSinkAsync]
      return deleted;
    }
docs: [VARIABLE "my_sink_name"]