function startOfWeekYear(dirtyDate, dirtyOptions) {
  __WEBPACK_IMPORTED_MODULE_3__lib_requiredArgs_index_js__["a" /* default */](1, arguments);
  var options = dirtyOptions || {};
  var locale = options.locale;
  var localeFirstWeekContainsDate = locale && locale.options && locale.options.firstWeekContainsDate;
  var defaultFirstWeekContainsDate = localeFirstWeekContainsDate == null ? 1 : __WEBPACK_IMPORTED_MODULE_2__lib_toInteger_index_js__["a" /* default */](localeFirstWeekContainsDate);
  var firstWeekContainsDate = options.firstWeekContainsDate == null ? defaultFirstWeekContainsDate : __WEBPACK_IMPORTED_MODULE_2__lib_toInteger_index_js__["a" /* default */](options.firstWeekContainsDate);
  var year = __WEBPACK_IMPORTED_MODULE_0__getWeekYear_index_js__["a" /* default */](dirtyDate, dirtyOptions);
  var firstWeek = new Date(0);
  firstWeek.setFullYear(year, 0, firstWeekContainsDate);
  firstWeek.setHours(0, 0, 0, 0);
  var date = __WEBPACK_IMPORTED_MODULE_1__startOfWeek_index_js__["a" /* default */](firstWeek, dirtyOptions);
  return date;
}
@name startOfWeekYear
@category Week-Numbering Year Helpers
@summary Return the start of a local week-numbering year for the given date.

@description
Return the start of a local week-numbering year.
The exact calculation depends on the values of
`options.weekStartsOn` (which is the index of the first day of the week)
and `options.firstWeekContainsDate` (which is the day of January, which is always in
the first week of the week-numbering year)

Week numbering: https://en.wikipedia.org/wiki/Week#Week_numbering

### v2.0.0 breaking changes:

- [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).

@param {Date|Number} date - the original date
@param {Object} [options] - an object with options.
@param {Locale} [options.locale=defaultLocale] - the locale object. See [Locale]{@link https://date-fns.org/docs/Locale}
@param {0|1|2|3|4|5|6} [options.weekStartsOn=0] - the index of the first day of the week (0 - Sunday)
@param {1|2|3|4|5|6|7} [options.firstWeekContainsDate=1] - the day of January, which is always in the first week of the year
@returns {Date} the start of a week-numbering year
@throws {TypeError} 1 argument required
@throws {RangeError} `options.weekStartsOn` must be between 0 and 6
@throws {RangeError} `options.firstWeekContainsDate` must be between 1 and 7

@example
// The start of an a week-numbering year for 2 July 2005 with default settings:
var result = startOfWeekYear(new Date(2005, 6, 2))
//=> Sun Dec 26 2004 00:00:00

@example
// The start of a week-numbering year for 2 July 2005
// if Monday is the first day of week
// and 4 January is always in the first week of the year:
var result = startOfWeekYear(new Date(2005, 6, 2), {
  weekStartsOn: 1,
  firstWeekContainsDate: 4
})
//=> Mon Jan 03 2005 00:00:00