declare global {
  interface BigInt {
    /**
     * Returns the total number of years of the `Duration`.
     *
     * @example
     * ```typescript
     * (2).years.asYears(); // => 2
     * ((2).years + (3).months).asYears(); // => 2.25
     * ```
     */
    asYears(): number;
  }
}
export {};
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