The 'spring plate' is what I've heard it called; not sure if that's the correct technical term. I've seen cabinets where the plate was removed and an empty space left, and I've seen others that removed the spring plate and found (or made) a rectangular tray that slipped into that space. It's not needed in any way. Might be an opportunity to get creative with the space! =)
For a moment there, I thought you were asking about the
rubber band method...
which I highly recommend.