export declare const sum: (a: number, b: number) => number;
export declare const obj: {
    a: number;
    b: number;
};
export declare const null_: null;
export declare const zero = 0;
export declare const four = 4;
export declare const zeroDotThree: number;
export declare const fruitList: string[];
export declare const callbackFn: (cb: any) => void;