syntax_data: {"ast_node_type":"function","tokens":[{"end":73,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // We accounted for the binder of the fn sig, so skip the binder.
context_before:         let sig = tcx.fn_sig(def_id).instantiate_identity();
context_after:         sig.skip_binder().visit_with(&mut ImplTraitInTraitFinder {