export const PRESERVE_REF = Symbol.for("node-red.preserve");

import { PRESERVE_REF } from "node-red/core"; 
msg.file = {
  [PRESERVE_REF]: true,
  handle: fsHandle
}; 
send(msg);

import { PRESERVE_REF } from "../symbols"; 

function clone(msg) {
   // for each prop in msg
   if (value && typeof value === "object") {
    if (value[PRESERVE_REF]) {
      // store it by its key and delete the key
    }}
   // deep clone as today
   // for each prop in store restore refs in msg by key
  }
}