title: flink 1.3 metric / operator naming: Group multiple operations under one name
body: <p>I am trying to combine multiple map operations on my <code>dataStream</code> into one group so that in the metrics / flink dashboard visualization my operator chain <code>(map -&gt; map -&gt; map)</code> shows up as <code>(foo)</code>. 
  Calling <code>#name</code> on the last map leaves me with <code>(map -&gt; map -&gt; foo)</code> rather than <code>(foo)</code>.</p>
  
  <p>Can this be done? I like grouping my logic into map/filter/flatMap blocks and want to avoid rewriting it to fit into a single flatMap just to clean up the metric names.</p>
  
  <p>(flink 1.3)</p>