* @summary Get the number of full years between the given dates.
5
*
6
* @description
7
* Get the number of full years between the given dates.
8
*
9
* @typeParam DateType - The `Date` type, the function operates on. Gets inferred from passed arguments. Allows to use extensions like [`UTCDate`](https://github.com/date-fns/utc).
10
*
11
* @param dateLeft - The later date
12
* @param dateRight - The earlier date
13
*
14
* @returns The number of full years
15
*
16
* @example
17
* // How many full years are between 31 December 2013 and 11 February 2015?
18
* const result = differenceInYears(new Date(2015, 1, 11), new Date(2013, 11, 31))