{"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"expected_str.push(self.expected.fn_sig(self.tcx).to_string(),"}]}
        expected_str.push(self.expected.fn_sig(self.tcx).to_string(), false);
        let mut expected_str = DiagStyledString::new();
        let mut found_str = DiagStyledString::new();