scalap and determining if ClassSymbol is Class or Object

I am trying to determine if a ClassSymbol is an Object or a Class:

        ScalaSigParser.parse(cf).foreach(_.symbols.foreach({
            case cs@ClassSymbol(symbolInfo: SymbolInfo, thisTypeRef: Option[Int]) =>
                val cn = symbolInfo.name

Anyone knows how can this be done?

for scalap 2.9.0 & scala 2.9.0

Thanks,

Kostas