Bean two with handcrafted comparison

BeanTwo.groovy

package delegation

import groovy.transform.TupleConstructor

@TupleConstructor
class BeanTwo implements Comparable<BeanTwo> {
    int yob

    public int getAge() {
        new Date().year - yob
    }

    @Override
    int compareTo(BeanTwo o) {
        if (!o) return false
        if (this.is(o)) return false
        return age <=> o.age

    }
}