code: function log(message, level) {
      var prefix = "[" + colors.cyan("gulp-tslint") + "]";
      if (level === "error") {
          fancyLog(prefix, colors.red("error"), message);
      }
      else {
          fancyLog(prefix, message);
      }
  }
docs: Log an event or error using gutil.log.
  @param {string} message the log message.
  @param {string} level can be "error". Optional.
  Leave empty for the default logging type.