Style a range of cells with phpexcel

I'm trying to style an excel table with phpexcel. I do this:

$sheet->getStyle('A1:B2')->applyFromArray($style);

But it would be better if I can give numeric coordinates. I can use getStyleByColumnAndRow($x, $y) with one cell, but not with a range. Any ideas? Is it supported?

Thanks in advance, M.