public MetaPage(MetadataExtractor.Directory directory)
 {
     Name = directory.Name;
     Tags = directory.Tags.Select(x => new MetaTag(x, directory.GetObject(x.Type))).ToArray();
 }
        //====== private methods

        private FileMetadataGroup ToGroup(MetadataExtractor.Directory dir)
        {
            return(new(dir.Name, dir.Tags.Select(ToEntry)));
        }