Github user Bekreth commented on the issue:
https://github.com/apache/flink/pull/5844
What I was hoping to achieve was a CassandraSink that could write objects
as single statements, or in a batch statement. This would allow for minor
transaction protection, guarenteeing a group of elements are all successfully
written together. However, it seems clear to me that I missed the forest for
the trees on this one. Looking over the `SinkFunction`, its clear to me the
only way this functionality could be added would be to overload the `invoke`
method on the `@Public` interface.
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