export declare const HAS_MAP: boolean;
export declare const HAS_SET: boolean;
export declare const HAS_WEAK: boolean;
export declare const m = "__@@map";
export declare const s = "__@@set";
export declare const _EqCheck: (x: any, y: any) => boolean;
export declare const normalizeNegativeZero: (k: any) => any;
export declare const _mapKey = "__@@mkey";
export declare const _mapVal = "__@mVal";