title: How do you merge cells in a Flex Datagrid?
body: <p>Is there any way to merge cells (vertically and/or horizontally) in a datagrid? At least, for example, is there a way to show that certain datagridcolumns belong to one group.</p>
  
  <p>For example, I'll take three columns: column1, column2, column3.
  All these three should be grouped to the Category cell with a rowspan of 3 -- a "super header" if you will.</p>
  
  <p>Thanks, let me know.</p>