Piece of cake like pattern in Groovy

pieceofcake.groovy

import groovy.util.ProxyGenerator
import groovy.transform.CompileStatic

// just for tests, can be replaed by any mocking framework
class Mock {
    static <T> T f(Class<T> clazz, Closure cl) {
         ProxyGenerator.INSTANCE.instantiateAggregateFromBaseClass(cl, clazz)
    }
}

@CompileStatic
class ServiceA {
    String m1() { '1' }
}

@CompileStatic
class ServiceB {
    String m2() { '2' }
}

@CompileStatic
trait ServiceComponent {
    @Lazy ServiceA serviceA = new ServiceA()
    @Lazy ServiceB serviceB = new ServiceB()
}

@CompileStatic
class ServiceConsumer implements ServiceComponent {
    void test() { println "${serviceA.m1()} ${serviceB.m2()}" }
}

class ServiceConsumer2 extends ServiceConsumer {
   ServiceA serviceA = Mock.f(ServiceA) { 'mocked!' }
}

def sc = new ServiceConsumer()
def sc2 = new ServiceConsumer2()

[sc,sc2]*.test()