export type None = null | undefined;
export declare const None: null;
export declare function equal(a: any, b: any): boolean;
export declare function merge<T extends Exclude<object, None>>(target: T, source: T): T;
export declare function enumerable(value: boolean): (target: unknown, propertyKey: string, descriptor: PropertyDescriptor) => void;
export declare const NUMBER_CHAR: string, LOWER_CASE_LETTER: string, UPPER_CASE_LETTER: string, LETTER: string;
export declare function randomString(length?: number, charset?: string): string;