Hi gurus

How to determine Class type of Object in collection?

class Human{...}
class Man extends Human{...}
class Women extends Human{...}

def humans = Human.findAll() 
humans.each(){ human ->

    // ??? , it is not work
   if ( human instanceof Man ) { println "Man" }
   if ( human instanceof Woman ) { println "Woman" }
}

Thanks a lot,
Tom