code: protected URI getURIFromPath(Path fsPath, Path fsSpecStoreDirPath) {
      return PathUtils.relativizePath(fsPath, fsSpecStoreDirPath).toUri();
    }
docs: Recover {@link Spec}'s URI from a file path.
  Note that there's no version awareness of this method, as Spec's version is currently not supported.
  
  @param fsPath The given file path to get URI from.
  @return The exact URI of a Spec.