Function unpack

docs/app/js/sanddance-app.js:141835–141839

(obj, keys)

        defaults: {}
    }, config);
    const unpack = (obj, keys)=>{
        keys.forEach((k)=>{
            if ((0, _vegaUtil.isArray)(obj[k])) obj[k] = (0, _vegaUtil.toSet)(obj[k]);
        });
    };
    unpack(events1.defaults, [
        "prevent",
        "allow"