{"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":"//"}]}
        // We are at the `DiagInner`/`DiagCtxtInner` level rather than the
    fn decorate(self, dcx: &DiagCtxtInner) -> DiagInner {
        // usual `Diag`/`DiagCtxt` level, so we must construct `diag` in a