import type { UserPreferences } from '@ms-cloudpack/common-types';
/**
 * Validate and write an update to a user preference item.
 * Creates the file if it doesn't already exist.
 *
 * Throws an error if the key is not a valid user preference name.
 */
export declare function updateUserPreference(params: {
    key: keyof UserPreferences;
    /** Update `key` to `newValue` */
    newValue?: string;
    /** Delete `key` */
    deleteValue?: boolean;
}): Promise<void>;
//# sourceMappingURL=updateUserPreference.d.ts.map