Try to further understanding the interface/module of OCaml

Question

I understand in OCaml there are concepts of interfaces and module.

And I understand how to use them now.

However, what I don\'t under

Answer 1

Since 3.12.1 OCaml allows this syntax for opening and aliasing modules:

let foo .... =
  let module HashTable = HashMap in (* magic is here *)
  let h = HashTable.create () in
  ....

So u just need to rename module what you are using where you are using it.