public void setBean(Object bean) {
            this.bean = bean;
        }
When this configuration is parsed sufficiently to create (or find) an actual bean instance, that instance
will be associated with its configuration by setting it via this method.

@param bean the bean instantiated (or found) that corresponds to this BeanConfiguration instance.
config/ogdl/src/main/java/org/apache/shiro/config/ogdl/ReflectionBuilder.java