How to read a another file from Pixlet app?

Is there a way to read the contents of another file from your Pixlet app?

Use Case: I have the base64 encoded text of an image stored in another file. I want my app to fetch that text from that other file and then use it in the Image widget.

Not from another local file. The only things you can do are a) put the file on a web server and http.get() it, or b) embed the content in your starlark file.