Can Path<T> extend string?

[acurrieclark]

I am using getByPath in a helper function and passing in a Path<T> as a parameter. The path is useful to me in another package, which takes an array rather than a "dotted" path. However, attempting path.split('.') throws up a Property 'split' does not exist on type 'Path<T>' typescript error.

function takesPathAsArray(path: string[]) {
  // does something fancy with the path
}

function helperFn<T>(obj: T, path: Path<T>) {
  const value = getByPath(obj, path);

  // error is here                       v v v v v v v v 
  const somethingElse = takesPathAsArray(path.split('.'));
}

I can of course cast path as a string there, but I was wondering if there was a way for the library to support it?