eption.html?is-external=true" title="class or interface in java.lang" class="externalLink">Exception</a></pre>
<div class="block">The mapPartitions method that receives control at the 
 start of partitioned step processing. The method 
 returns a PartitionPlan, which specifies the batch properties 
 for each partition.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>partition plan for a partitioned step.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs