export declare function isExternal(path: any): boolean;
export declare function validUsername(str: any): boolean;
export declare function validURL(url: any): boolean;
export declare function validLowerCase(str: any): boolean;
export declare function validUpperCase(str: any): boolean;
export declare function validAlphabets(str: any): boolean;
export declare function validEmail(email: any): boolean;
export declare function isString(str: any): boolean;
export declare function isArray(arg: any): boolean;
export declare function isObject(obj: any): boolean;
export declare function isFunction(value: any): boolean;
export declare function validPassword(url: any): boolean;
export declare function isJSON(str: any): boolean | undefined;
export declare function isNumber(str: any): boolean;
export declare function validAccountPrefix(str: any): boolean;
export declare function isInteger(str: any): boolean;