declare module "hijri-converter" {
    export function toHijri(
      gy: number,
      gm: number,
      gd: number,
    ): {
      hy: number;
      hm: number;
      hd: number;
    };
    export function toGregorian(
      hy: number,
      hm: number,
      hd: number,
    ): {
      gy: number;
      gm: number;
      gd: number;
    };
  }