@Override
    public List<? extends ImageMetadataItem> getItems() {
        final ArrayList<ImageMetadataItem> items = new ArrayList<>(super.getItems());
        if (exif != null) {
            items.addAll(exif.getItems());
        }
        return Collections.unmodifiableList(items);
    }
Returns the Exif metadata.

@return {@code null} if no Exif metadata is available; otherwise, returns the Exif metadata.
src/main/java/org/apache/commons/imaging/formats/webp/WebPImageMetadata.java