Switching to docs , it looks like faces-config.xml is required. However, for some reason I thought Facelets used annotations, and therefore xml-config (?) Is not required. They say:
To configure JavaServer Faces Facelets features as ViewHandler, modify your face-config.xml project to specify an element
It seems that Facelets tutorials are often dead links or, as above, will soon be dead links :(
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