export declare type ObjectWithOnlyOne<K extends string, V = unknown> = {
    [P in K]: Record<P, V> & Partial<Record<Exclude<K, P>, never>> extends infer O ? {
        [Q in keyof O]: O[Q];
    } : never;
}[K];
export declare const isObjectWithOnlyOne: <K extends string>(value: unknown, keys?: Record<string, unknown> | undefined) => value is ObjectWithOnlyOne<K, unknown>;