gtk:cell-area-box-pack-end (box renderer &key expand align fixed)

box -- a gtk:cell-area-box widget
renderer -- a gtk:cell-renderer object to add
expand -- a boolean whether renderer should receive extra space when the area receives more than its natural size
align -- a boolean whether renderer should be aligned in adjacent rows
fixed -- a boolean whether renderer should have the same size in all rows

Adds a renderer to cell area box, packed with reference to the end of the box. The renderer is packed after, away from end of, any other gtk:cell-renderer object packed with reference to the end of the box.