import { z } from 'zod';
declare module "zod" {
    interface ZodString {
        unique(arg?: boolean): this;
        sparse(arg?: boolean): this;
    }
    interface ZodNumber {
        unique(arg?: boolean): this;
        sparse(arg?: boolean): this;
    }
    interface ZodDate {
        unique(arg?: boolean): this;
        sparse(arg?: boolean): this;
    }
}
export declare function extendZod(zod: typeof z): void;
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