/**
 * Feature flag for Apple's native CSS button (see README "Native Apple Pay button").
 *
 * It is on for known non-production hosts (localhost, dev, stage) so it can be tested, and OFF for
 * production until this constant is flipped to `true` in a release.
 *
 * Fails closed: only `localhost`, `dev.*` and `stage.*` count as non-production. Any other host
 * (www.economist.com, previews, IPs, tunnels) keeps the custom button while the flag is off.
 * A host can force either value with `configureApplePay({ nativeButton })`.
 */
export declare const NATIVE_BUTTON_ENABLED_IN_PRODUCTION = false;
export declare const isNativeButtonEnabled: (hostname?: string, override?: boolean, enabledInProduction?: boolean) => boolean;