import type { CustomTypeCheck } from "../custom/types.ts";
export declare function isObject<T extends Record<PropertyKey, any>>(input: unknown, validator?: CustomTypeCheck<T>): input is typeof validator extends CustomTypeCheck<infer U> ? U : T;
type Validator<T> = (input: any) => T | null;
interface ObjectSchema {
    [key: string]: Validator<any> | ObjectSchema;
}
type InferSchema<T> = {
    [K in keyof T]: T[K] extends Validator<infer U> ? U | null : T[K] extends ObjectSchema ? InferSchema<T[K]> : never;
};
export declare function object<T extends ObjectSchema>(input: unknown, schema: T): InferSchema<T>;
export {};