How to create an `UNNotificationAttachment` with an Image that uses UNNotificationAttachmentOptionsThumbnailClippingRectKey to select only a portion of the image?

The code compiles, however it shows the image just like without options:

let options: [AnyHashable: Any] = [
  UNNotificationAttachmentOptionsThumbnailClippingRectKey: CGRect(
    origin: CGPoint(x: 0.1, y: 0.1),
    size: CGSize(width: 0.1, height: 0.1)
  )
]

let attachment = try? UNNotificationAttachment(
  identifier: image.url,
  url: fileUrl,
  options: options
)

The documentation says I should use CGRectCreateDictionaryRepresentation but it is not available.

Cannot find 'CGRectCreateDictionaryRepresentation' in scope

Am I missing something?