@Override
    protected Class<?> getBeanClass(Element element) {
        return SpockSpyBeanPostProcessor.class;
    }
Adds support for the spock:wrapWithSpy element.

Spring integration of spock mocks is heavily inspired by
Springockito {@see https://bitbucket.org/kubek2k/springockito}.

@author Taylor Wicksell
spock-spring/src/main/java/org/spockframework/spring/xml/WrapWithSpyBeanDefinitionParser.java