/**
 * Returns the total number of years of the `Duration`.
 * @param duration The `Duration` to get the total number of years of.
 *
 * @example
 * ```typescript
 * asYears(years(2)); // => 2
 * asYears(years(2) + months(3)); // => 2.25
 * ```
 */
declare const asYears: (duration: bigint) => number;
export default asYears;
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