public ListBoxModel doFillSizeIdItems(@RelativePath("..") @QueryParameter String authToken) throws Exception { List<Size> availableSizes = DigitalOcean.getAvailableSizes(authToken); ListBoxModel model = new ListBoxModel(); for (Size size : availableSizes) { model.add(DigitalOcean.buildSizeLabel(size), size.getSlug()); } return model; }