{"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"err.subdiagnostic(MaybeMissingMacroRulesName"}]}
            err.subdiagnostic(MaybeMissingMacroRulesName { spans });
            spans.push_span_label(label_span, "put a macro name here");
            return;