}
}
"""
        CompilationUnit unit = new CompilationUnit(new GroovyClassLoader(target))
        unit.addSource("action", src)
        ClassCollector collector = new ClassCollector(target: target)
        unit.setClassgenCallback(collector);
        unit.compile(Phases.CLASS_GENERATION);

        Object instance = JavaReflectionUtil.newInstance(collector.generated)
        instance.key = counter.getAndIncrement()