accessing conversationScope from a authn flow reuseCondition-ref bean

[Jim Fox]

We have a password flow reuseCondition bean that selectively allows or 
disallows reuse of the password flows session.  I'd like to record 
something in the requestContext conversationScope.

In the mfa flow that is:

  requestContext = input.getSubcontext("net.shibboleth.idp.profile.context.SpringRequestContext").getRequestContext();
  conversationScope = requestContext.getConversationScope();

How can I get the conversationScope from inside the reuseCondition bean?
It is defined as

   public class SessionReuse implements Predicate<ProfileRequestContext> {


Thanks
Jim