export declare function isObject(item: any): boolean;
export declare function isObjectEmpty(obj?: object): boolean;
export declare function isObjectValues(obj?: object): boolean;
export declare function isObjectValuesEmpty(obj?: object): boolean;
export declare function isDefined(v: any): boolean;
export declare function isNullableDefined(v: any): boolean;
export declare function isNull(v: any): boolean;
export declare function isEmail(email?: string): boolean;
export declare function isIteger(value: any): boolean;