How to Async Replace Substring in OCaml - Code Snippet

(* Task: Async Replace Substring
(* Language: OCaml

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