I am defining a panel, which is visible only if at least one of its children
is visible.  So, it's isVisble() method calls visitChildren() with a visitor
that returns true as soon as it finds a visible child or null otherwise. 
This worked until I started using an AuthorizationStrategy, now I also need
to check isRenderAllowed(), but it is protected.  I looked at
isVisibleInHierarchy(), but it goes through the component's ancestors and,
in my case, causes an infinite loop.

So, why is isRenderAllowed() protected when isEnabledAllowed() is public?

or maybe a better question

Is there a better way to do this visibility check?

Thanks
Chuck
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