export declare const isStringOrNumber: (o: any) => boolean;
export declare const isReactNode: (o: any) => boolean;
export declare const isEmpty: (o: any) => boolean;
export declare const isArray: (o: any) => boolean;
export declare const isObject: (o: any) => boolean;
export declare const clone: (source: any) => {
    [x: string]: any;
};