/**
 * Pure function - doesn't mutate either parameter!
 * Uses the default options and overrides with the options provided by the user
 * @param defaultOptions the defaults
 * @param userOptions the user opts
 * @returns the options with defaults
 */
declare function applyDefault<User extends readonly unknown[], Default extends User>(defaultOptions: Readonly<Default>, userOptions: Readonly<User> | null): Default;
export { applyDefault };
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