export declare function isDefined<T>(value: T | undefined | null): value is T;
export declare function typeOf<T>(value: unknown, type: string): value is T;
export declare function isArray<T>(value: unknown): value is Array<T>;
export declare function isBool<T>(value: unknown): value is Boolean;
export declare function isBoolean<T>(value: unknown): value is Boolean;
export declare function isFunction<T>(value: unknown): value is Function;
export declare function isNumber<T>(value: unknown): value is number;
export declare function isString<T>(value: unknown): value is string;
export declare function isObject<T>(value: unknown): value is any;
export declare function createUniqueIDFactory(prefix?: string): () => string;
export declare function createUniqueIndexFactory(start?: number): () => number;
export declare function noop(): undefined;