title: How to reference current sheet data for excel graphs without sheet name
body: <p>I'm planning to use the java library POI to read a sheet from an excel template, populate data and store it to a target workbook repeated for n times.
  The template/master sheet contains a graph and the "series value" for the graph must be 
  composed with the sheetname, like <code>=sheet1!$D$52:$D$310</code></p>
  
  <p>I feel that this is going to interfere with my idea of templating, because the cloned sheets will inevitably need to get new names and the graph series won't be able to reference them anymore.</p>
  
  <p>Is there a way to solve this easily either by doing something smart with the graph series or by doing something in POI?</p>