How to set and get key/ID to a particular layer.

Hi all,

I have many layerSets and each layer set contains two art layers, I want to provide/set the unique IDs/key to all these layers such that each art layer of a particular layerset have same ID.

After this, I have to randomly move the art layers from one layer set to another and find the pairs of art layers. For this, I need to get the unique IDs/Key back.

So, Is there any way to set and get the unique ID/Key to a layer or layer set?

Thanks In advance,

_VG.