export declare function selectRandom<T>(items: readonly T[]): T | undefined;
export declare function selectRandomSample<T>(items: readonly T[], num: number): T[];
export declare function getRandomNumber(min?: number, max?: number): number;
export declare function getRandomId(length?: number): string;
export declare function getRandomBattleId(): string;
export declare function createRandomSample<T>(min: number, max: number, func: (...params: any[]) => T): T[];