> @nwangtw a KeyBy operator will always be a fieldgrouping Yeah. Very likely.
We dont have a grouping function yet currently. Custom grouping might be a separated function or uses keyBy() interface. We will see. [ Full content available at: https://github.com/apache/incubator-heron/pull/3040 ] This message was relayed via gitbox.apache.org for devnull@infra.apache.org
