code: private void generateBucketDelete(TableBucket bucket, UpdateInstructions update) {
          if (bucket.exists()) {
              update.withAttribute(new AttributeUpdate(bucket.getHash(), AttributeUpdateType.Replace, Attributes.NULL_ATTRIBUTE_VALUE));
              update.bucketRemoved();
          }
      }
docs: Generates one or more {@link AttributeUpdate}s that will delete a {@link TableBucket}.
  
  @param bucket           The {@link TableBucket} to delete.
  @param update A {@link UpdateInstructions} object to collect updates into.