datagrid column header split

greetings,

i using flashbuilder 4.5 php premium.    have datagrid , need

to have multiple column headers spanning others.  found an

example has multiple header/iterm renderers, mx:datagrid,

not spark.  example calls splitdatagridheader.   there way to

do spark (s:datagrid) without extra?

 

the following image of mx version running:

 

thanks.

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