import { PrototypeStruct } from '..';
export declare function dateIsDate(x: any): boolean;
export declare type IsDateFn = (x: any) => boolean;
export declare const isDate: PrototypeStruct;
declare global {
    interface DateConstructor {
        isDate: IsDateFn;
    }
}
//# sourceMappingURL=is-date.d.ts.map