{"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"Diag::new(dcx,"}]}
        Diag::new(dcx, level, fluent::attr_parsing_unknown_meta_item)
        let expected = self.expected.iter().map(|name| format!("`{name}`")).collect::<Vec<_>>();
            .with_span(self.span)