export declare const mixinBoxShadow: (variables: any, shadowColor: any, shadowOffset: any, shadowOpacity: any, shadowRadius: any) => {
    shadowColor: any;
    shadowOffset: any;
    shadowOpacity: any;
    shadowRadius: any;
    elevation: number;
} | {
    shadowColor?: undefined;
    shadowOffset?: undefined;
    shadowOpacity?: undefined;
    shadowRadius?: undefined;
    elevation?: undefined;
};