code: function parseTargetDevicePreference(value) {
      if (!value) return null;
      var map = { 'universal': '"1,2"', 'handset': '"1"', 'tablet': '"2"'};
      if (map[value.toLowerCase()]) {
          return map[value.toLowerCase()];
      }
      events.emit('warn', 'Unknown target-device preference value: "' + value + '".');
      return null;
  }
docs: Converts cordova specific representation of target device to XCode value