{"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":"//"}]}
        // `trait Foo: Bar<A> + Bar<B>` and `dyn Foo: Unsize<dyn Bar<_>>`
        // There may be multiple unsize candidates for a trait with several supertraits:
        if cx.is_lang_item(trait_def_id, TraitSolverLangItem::Unsize) {