How to define Row Header Styles individual - Guess I am almost there...

I am setting row headers (labels for each row) with the following function:
obj.setRowProperty("text",
function(i){
return reportData[i][1];
}
);

I need to format specific row headers differently, for example in bold. Is there a way to define that (I am almost certain there is one, considering how powerful the ActiveWidget Grids is).

I am using for individual row formatting the following, and probably there is something similar to set the column header, but I cannot figure it out right now:

var rowFontWeightTotals = function() {
var rowIndex = this.getProperty("row/index");
var val = reportData[rowIndex][0];
//alert(val);
if( val == 'Total' ){
return "bold";
}
}

var row = new Active.Templates.Row;

row.setStyle("font-weight", rowFontWeightTotals);
obj.setTemplate("row", row);