function differenceInCalendarQuarters(dirtyDateLeft, dirtyDateRight) {
  __WEBPACK_IMPORTED_MODULE_2__lib_requiredArgs_index_js__["a" /* default */](2, arguments);
  var dateLeft = __WEBPACK_IMPORTED_MODULE_1__toDate_index_js__["a" /* default */](dirtyDateLeft);
  var dateRight = __WEBPACK_IMPORTED_MODULE_1__toDate_index_js__["a" /* default */](dirtyDateRight);
  var yearDiff = dateLeft.getFullYear() - dateRight.getFullYear();
  var quarterDiff = __WEBPACK_IMPORTED_MODULE_0__getQuarter_index_js__["a" /* default */](dateLeft) - __WEBPACK_IMPORTED_MODULE_0__getQuarter_index_js__["a" /* default */](dateRight);
  return yearDiff * 4 + quarterDiff;
}
@name differenceInISOWeekYears
@category ISO Week-Numbering Year Helpers
@summary Get the number of full ISO week-numbering years between the given dates.

@description
Get the number of full ISO week-numbering years between the given dates.

ISO week-numbering year: http://en.wikipedia.org/wiki/ISO_week_date

### 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).

- The function was renamed from `differenceInISOYears` to `differenceInISOWeekYears`.
  "ISO week year" is short for [ISO week-numbering year](https://en.wikipedia.org/wiki/ISO_week_date).
  This change makes the name consistent with
  locale-dependent week-numbering year helpers, e.g., `addWeekYears`.

@param {Date|Number} dateLeft - the later date
@param {Date|Number} dateRight - the earlier date
@returns {Number} the number of full ISO week-numbering years
@throws {TypeError} 2 arguments required

@example
// How many full ISO week-numbering years are between 1 January 2010 and 1 January 2012?
var result = differenceInISOWeekYears(
  new Date(2012, 0, 1),
  new Date(2010, 0, 1)
)
//=> 1