<span class="cl"><span class="w"></span><span class="p">}</span><span class="w">
</span></span></span></code></pre></div><ul>
<li>
<p><code>processElement()</code> receives input events one by one. You can react to
each input by producing one or more output events to the next
operator by calling <code>out.collect(someOutput)</code>. You can also pass data
to a <a href="//nightlies.apache.org/flink/flink-docs-release-1.11/dev/stream/side_output.html">side
output</a>
or ignore a particular input altogether.</