/**
 * Common types and type predicates.
 */
/**
 * A JSON-like value.
 */
export type JSONValue = string | number | null | undefined | boolean | JSONValue[] | {
    [key: string]: JSONValue;
};
/**
 * A type predicate for the Array object.
 */
export declare function isArray(value: unknown): value is unknown[];
/**
 * A type predicate for object.
 */
export declare function isObject(value: unknown): value is object;
/**
 * A type predicate for a string primitive.
 */
export declare function isString(value: unknown): value is string;
/**
 * A type predicate for a number primitive.
 */
export declare function isNumber(value: unknown): value is number;