{"ast_node_type":"other","tokens":[{"end":94,"kind":"keyword","start":0,"text":"///"}]}
    /// getting the full set of predicates in scope and then filtering down to find those that
    /// like `T::Item` where `T` is a type parameter. In principle, we would do that by first
    /// apply to `T`, but this can lead to cycle errors. The problem is that we have to do this