export declare const hasOwn: (v: PropertyKey) => boolean;
export declare const slice: (start?: number, end?: number) => any[];
export declare function keys(obj: any): string[];
export declare function isEmpty(obj: any): boolean;
export declare function last(array: any, n: any, guard: any): any;
export declare const SUPPORTED_DDP_VERSIONS: string[];
export declare function parseDDP(stringMessage: string): any;
export declare function stringifyDDP(msg: any): string;