import type { JsonObject, JsonValue } from 'type-fest';
/**
 * indicate whether the supplied value is a JSON object
 * @param subject the subject to be tested
 * @returns true if the subject is a JSON object
 */
export declare function isJsonObject(subject: unknown): subject is JsonObject;
/**
 * check if value is JSON compatible
 * @param subject value to be checked
 * @returns true if the value is JSON compatible
 */
export declare function isJsonCompatible(subject: unknown): subject is JsonValue;
/**
 * indicates whether the target is a plain object
 * @param subject target to be checked
 * @returns true if the target is a plain object
 */
export declare function isPlainObject(subject: unknown): subject is Record<string, unknown>;
//# sourceMappingURL=object.d.ts.map