{"ast_node_type":"import","tokens":[{"end":79,"kind":"keyword","start":0,"text":"gate_all!(where_clause_attrs,"}]}
    gate_all!(where_clause_attrs, "attributes in `where` clause are unstable");
    gate_all!(contracts_internals, "contract internal machinery is for internal use only");
    gate_all!(super_let, "`super let` is experimental");