code: function _extractLocaleMonths(abbr, locale) {
        var months = []
        if(abbr) {
          months = cldr ? cldr.extractMonthNames(locale).format.abbreviated : ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];
        }
        else {
          months = cldr ? cldr.extractMonthNames(locale).format.wide : ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'];
        }
  
        months.unshift('');
        return months;
      }
docs: Extracts the wide or abbreviated month names for a specified locale.
  If cldr is not installed values default to that for locale en_US.
  
  @param {Boolean} abbr
  @param {String} locale
  @api private