How do I preload images into dropzone.js

It is programmatically instantiated, as it is part of a larger form. I have it trigged up to process the queue when the form is submitted.

The goal is for my users to be able to use the dropzone to manage images for an item, so when I load my 'models/edit' view for an item, I'd like to preload the dropzone with the images that had previously been uploaded for that item. Is there a good way to implement this so that the already-there items don't get re-uploaded when they submit their changes to the image list?

No file, test, or entry point is identified in the issue. First clarify the expected preload behavior and how existing images should be distinguished from new uploads; done means the edit form can display prior images and submit changes without re-uploading them.

Written by the indexing model from the issue text.