{"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"err.subdiagnostic(errors::AddReturnTypeSuggestion::Add"}]}
                    err.subdiagnostic(errors::AddReturnTypeSuggestion::Add {
                } else if let Some(found) = found.make_suggestable(self.tcx, false, None) {
                        span,