else if (o instanceof String) classname = (String)o;
else classname = o.getClass().getName();
if (classname.equals(lastClassName)) classname = "";
else lastClassName = classname;
else if (o instanceof String) classname = (String)o;
else classname = o.getClass().getName();
if (classname.equals(lastClassName)) classname = "";
else lastClassName = classname;