Grid: custom NumberRenderer

I'm creating a custom renderer that extend numberRenderer. In a server-side component. I need to get the row key or itemId. How can I do it?
Thank you.

Hi Juan,

From what I see in the NumberRenderer code, you unfortunately won't get the item id anywhere easily. This is something that we are aware of, and it would be helpful for us to solve this issue, if we knew how our users would use the items in rederers. Can you describe your use case so we can provide some means for you to make the modifications you need?

//Teemu