syntax_data: {"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":"traits::ImplSource::Builtin(BuiltinImplSource::Object(_),"}]}
source_snippet:         traits::ImplSource::Builtin(BuiltinImplSource::Object(_), _) => {
context_before:         }
context_after:             let trait_ref = ty::TraitRef::from_method(tcx, trait_id, rcvr_args);