class Employee{
 String firstName
 String lastName
}

class CompositeObject implements IterableEmployee> {
def employees = [
new Employee (firstName : "Menon", lastName : "Hari"),
new Employee (firstName : "Bhat", lastName : "Srini"),
new Employee (firstName : "Krishna", lastName : "Gurram")
]

@Override
    IteratorEmployee> iterator() {
        employees.iterator()
}
}

CompositeObject compositeObj = new CompositeObject()

def firsNames = compositeObj*.firstName
def lastNames = compositeObj*.lastName

println "firstNames : ${firsNames}"
println "lastNames : ${lastNames}"