{"ast_node_type":"impl","tokens":[{"end":104,"kind":"keyword","start":0,"text":"//"}]}
                // Avoid bogus "type annotations needed `Foo: Bar`" errors on `impl Bar for Foo` in case
                let trait_ref = tcx.impl_trait_ref(item.owner_id).unwrap().instantiate_identity();
                // other `Foo` impls are incoherent.