Image::Magick::Iterator adds iteration support to Image::Magick. This
means that if you have a stream of concatenated images, you can access
each image in the stream as an independent Image::Magick object.
Iteration functionality is not present in Image::Magick itself as of
version 5.56. Passing a stream of concatenated images would result in
essentially a “stack” of images which would all be manipulated in
parallel by any Image::Magick calls. Calls to Write() either output an
animated series of image (a la animated GIFs), or the first image in