(client mod) How to tells if a Composting Bin is full?

[Van Ca]

Hello, I'm modifying Action Queue to serve my needs.
I want to stop repeatedly giving materials to the full filled Composting Bin to move on to the next Composting Bin but don't know how to tell if is full or not.

I have compared full vs not full Composting Bin through ent:GetDebugString() but they have the same tags & working anim.

I also tried  

ent:AddComponent("compostingbin")

but 

ent.components.compostingbin:IsFull()

always return false.

Can you show me a way to tells if a Composting Bin is full or not? Thank you.