How to Async Get File Extension in OCaml - Code Snippet

(* Task: Async Get File Extension
(* Language: OCaml

let async_get_file_extension() =
    (* Implementation for Async Get File Extension
    let result = ...; (* Initialize variable
    (* TODO: Implement core logic here
    (* Step 1: Prepare data
    (* Step 2: Process Async Get File Extension
    print_endline("Done");
;;