Add an index CSS class to cells

Hi,

I created this little piece of code there …

function msk_pagebuilder_add_cell_class($cell_attrs) {
	$cell_index = 'panel-grid-cell-' . substr($cell_attrs['id'], -1);
	$cell_attrs['class'] .= ' ' . $cell_index;
	return $cell_attrs;
}
add_filter('siteorigin_panels_row_cell_attributes', 'msk_pagebuilder_add_cell_class', 10, 1);

… so grid cells now have a “panel-grid-cell-X” CSS class where X is the index of the cell in the row (starting 0).

I’m here to share this code, maybe it can be useful to some people.
But I’d also like to ask developers if there is a better way to get the cell index. As you can see, the only way I found is to get the cell generated ID ($cell_attrs['id']) and get the last letter of this string. A bit dirty IMHO.
Any idea to do this properly ? I tried to get global variables for the foreach index but can't seem to figure out.

Thanks !