Hash Function in chashmap

Is there a way to customize the hash function in chashmap? In particular I would like to use the the Nohasher-hash function because as it so happens, my vaues already store pseudo-random 4byte numbers. So I would do something like

HashMap<u32, Bytes, BuildNoHashHasher < u32 > >

but with chashmap. Is that possible?

It doesn't seem like it is possible.