Portlet FlowHandlerAdapter config samlpe incorrect in Chapter 14

<bean id="flowHandlerAdapter"
class="org.springframework.webflow.mvc.portlet.FlowHandlerAdapter">
<constructor-arg ref="flowExecutor" />
</bean>

isn't correct, since FlowHandlerAdapter's constructor is parameterless

<bean id="flowHandlerAdapter" class="org.springframework.webflow.mvc.portlet.FlowHandlerAdapter" >
<property name="flowExecutor" ref="flowExecutor" />
</bean>

works fine

please update doco