export declare const integer: (i: number) => boolean;
export declare const emptyObject: (obj: any) => boolean;
export declare const emptyArray: (arr: never[]) => boolean;
export declare const emptyString: (s: string) => boolean;
export declare const emptySet: (s: Set<never>) => boolean;
export declare const emptyMap: (m: Map<never, never>) => boolean;