{"ast_node_type":"import","tokens":[{"end":76,"kind":"keyword","start":0,"text":"//"}]}
        // <Self as Trait>::Assoc = Foo`. So every `Projection` clause is an
        // `dyn Trait<Assoc = Foo>` desugars to (not Rust syntax) `dyn Trait where
        // `Assoc = Foo` bound. `needed_associated_types` contains all associated