Help Retrieving contacts count only from a specific collision

[Rearden]

Hey there! Hope you are all doing well!

I am using Obi fluid. I know that we could receive a contacts count with 

Code:

e.contacts.Count

But it gives all current collision points. My question is there any chance to receive contacts count only for a specific collider? For example, the full count is 1000 and for a collider_1 the count is 300, for a collider_2 the count is 450, etc.

I am interested only in OnCollision event(simplex-collider).

Thank you!