title: Two-level column headings in ALV List
body: <p>I want to add a header row grouping the column headers.</p>
  
  <pre><code>        Departure                   Arrival        &lt;-- This row is what I want to add
  Airport    Gate    Date    Airport    Gate    Date
  --------   -----   -----   --------   -----   -------
  O'Hare     A10     10Mar   Atlanta    G19     10Mar
  DFW        K98     11Mar   Denver     Z76     11Mar
  </code></pre>
  
  <p>Note that I'm using an ALV <em>List</em>, not an ALV Grid.  I've looked at the sample program <code>BALVBT01</code> which has a 2-level header but it turns out it's because they are displaying parent/child data.  My data has only one level, I just want to group the columns.</p>