I'm a OCaml newbie.  I don't understand how to use infix functions that are
in modules when I don't want to use "open".

I did discover http://xahlee.org/ocaml/functions.html which explains that
an infix operator can be used as a prefix.  So, this format:

  ((Module.(op)) "foo" "bar")

does seem to work.  But, intuitively, it seems like:

 "foo" Module.(op) "bar"

would work -- it doesn't.

Is there a way to keep the infix notation?

Thanks.