xhooks would be very useful to have in anything that supports config. My use case is in overriding methods of the configurable-sub components of a component i'm already subclassing. e.g. the proxy in a store, the tab bar in a tabpanel, an animation in a layout, etc. It is messy having to create separate classes just to hook into a template method or two cleanly when the config will only be used in one place.
I moved this thread from the now read-only prerelease forum... apologies if you may have tried to reply.
Yes the ability to do this kind of thing at deeper levels would be useful as well. In many of those cases, there may first need to be support for passing in configs for those nested components, but I can see the usefulness of it.
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