ice box prefab question

[ascdqz]

Hello 

I'm new to dst modding. When I look at "icebox" prefab, I'm expecting to see a component that has a function that modifies "perish_rate" or "preserve_rate". But I didn't find it. The only relevant code is these two lines I think. When I look at container_widget.lua, there is nothing relevant with "perish_rate" or "ice box". And I also looked at the perishable.lua, there is not quite something relevant with "widget". The same for "ice_pack"(which I think is the "insulated backpack"). Does anyone know how it connects with "perishable.lua"(I guess). 

Thank you!

[Rickzzs]

look at containers.lua