4 * The UglifyJS options object for
5 * [compress](https://github.com/mishoo/UglifyJS2#compressor-options),
6 * [mangle](https://github.com/mishoo/UglifyJS2#mangler-options), and
7 * [output](https://github.com/mishoo/UglifyJS2#beautifier-options) options.
20 'comments': /^!|@cc_on|@license|@preserve/i,