Stable symbol GUID

[format-x]

I'm building a dependency graph of TypeScript project using ts-morph.

The goal is to get a deterministic, unique string representation of a symbol - something stable enough to uniquely identify it across modules (and parsing runs).

Is there any built-in function can produce this kind of FQN?
I know there's a getFullyQualifiedName() method, but it can produce duplicate names in some cases (and it doesn't take overloads into account?).

I guess I could build it from the file path and text span, but it would be nice if there were a built-in way to do this.

[format-x]

I think something like this will do the job (correct me if I'm wrong):

export function buildFQN(node: Node): string {
  // Probably should also trim extension
  const declPath = node.getSourceFile().getFilePath();
  const declBegin = node.getStart();
  const declEnd = node.getEnd();
  const loc = `${declBegin}-${declEnd}`;
  const locHash = crypto.createHash('md5').update(loc).digest('hex').slice(0, 8);
  const base = node.getSymbolOrThrow().getFullyQualifiedName();

  return `${base.startsWith('"') ? '' : `"${declPath}".`}${base}#${locHash}`;
}