{"ast_node_type":"other","tokens":[{"end":97,"kind":"keyword","start":0,"text":".insert(Macros20NormalizedIdent::with_dummy_span(sym::core),"}]}
                .insert(Macros20NormalizedIdent::with_dummy_span(sym::core), Default::default());
            extern_prelude
            if !attr::contains_name(attrs, sym::no_std) {