Adding a CSS class to a row


is there a meaning to add a css class to a row ?

like this:
mygrid.attachEvent(“onRowCreated”, function(id, ind){
var row = this.getRowById(id);
row.class = ‘.myclass’;

of course you may add a css class to a row.
But you can also create a new skin or fully modify a custom one in CSS or to change a style of a row in API methods