import { IOSAttachmentThumbnailClippingRect, IOSNotificationAttachment } from '../types/NotificationIOS';
export default function validateIOSAttachment(attachment: IOSNotificationAttachment): IOSNotificationAttachment;
/**
 * Validates a ThumbnailClippingRect
 */
export declare function validateThumbnailClippingRect(thumbnailClippingRect: IOSAttachmentThumbnailClippingRect): IOSAttachmentThumbnailClippingRect;