export declare function mapIterable<InT, OutT>(items: Iterable<InT>, mapFn: (item: InT) => OutT): Iterable<OutT>;
export declare function makeDistinct<ItemT, KeyT>(items: Iterable<ItemT>, selector?: (item: ItemT) => KeyT): ItemT[];
export declare function toMap<InT, KeyT, ValueT>(items: Iterable<InT>, keySelector: (item: InT) => KeyT, valueSelector: (item: InT) => ValueT): any;
export declare function toMap2<InT, KeyT, ValueT>(items: Iterable<InT>, keySelector: (item: InT) => KeyT, valueSelector: (item: InT) => ValueT): Map<KeyT, ValueT>;
export declare function determineType(value: any): string;
export declare function isObject(v: any): boolean;
export declare function isFunction(v: any): v is Function;
export declare function isString(v: any): v is string;
export declare function isDate(v: any): v is Date;
export declare function isBoolean(v: any): v is boolean;
export declare function isNumber(v: any): v is number;
export declare function isArray(v: any): v is Array<any>;
export declare function isUndefined(v: any): boolean;