How to allow custom input in Recycler?

Hey. I want to place an item inside recycler, but I am not able to since it's not in default recyicling item list or whatever.

How do I whitelist an item shortname? I have a plugin which will read the item OnRecycle and give appropriate output, but I am not able to place it inside in the first place.

Thanks!

They updated how the Recycler and ItemContainer accept or deny items. 

From the Recycler's ServerInit():

inventory.canAcceptItem = (Func<Item, int, bool>) Delegate.Combine((Delegate) inventory.canAcceptItem, (Delegate) new Func<Item, int, bool>((object) this, __methodptr(RecyclerItemFilter)));​

You would have to write your own method to replace that.