export declare namespace UtilityTypes {
    /** Mark some properties which only the former including as optional and set the value to never */
    type Without<T, U> = {
        [P in Exclude<keyof T, keyof U>]?: never;
    };
    /** get the XOR type which could make 2 types exclude each other */
    export type XOR<T, U> = T | U extends object ? (Without<T, U> & U) | (Without<U, T> & T) : T | U;
    export {};
}