title: Grouping columns under a single header in JSF
body: <p>Is there a way using JSF to group two or more columns under a single parent column in JSF? I have a dataTableEx with hx:columnEx columns inside of it. What I want is something like this:</p>
  <pre><code> [MAIN HEADER FOR COL1+2   ][Header for Col 3+4]
  
   [ COL1 Header][COL2 Header][COL3    ][COL 4   ] 
  
   Data          Data             Data     Data
  
   Data          Data             Data     Data
  
   Data          Data             Data     Data
  
   Data          Data             Data     Data
  </code></pre>
  <p>Data          Data            Data     Data</p>
  <p>Thanks</p>