Feature request for `refmt`: Return types on anonymous functions

[adamsmd]

refmt moves the return types of anonymous functions after the body of the function, but I want it to put the type after the arguments of the function

Here is what I want:

(x: int): int => some_large_computation;

Here is what refmt produces:

(x: int) => (some_large_computation: int);

You can test this with:

echo '(x: int): int => some_large_computation' | refmt

I'd like refmt produce the first and not the second.

Note that ocamlformat recently made a similar change (see https://github.com/ocaml-ppx/ocamlformat/issues/1368). I don't know how much refmt piggybacks on ocamlformat so that change might already implement what I am requesting.