Get ranges in graphemes or codepoints?

[tom-sherman]

Is there a way to get lexical to give the start and end offsets of nodes in graphemes instead of bytes?

I want to transform the data from the editor to an offset based system that looks something like this:

text: "emoji link: 👀"
facets:
  - type: bold
    start: 0
    end: 11
  - type: link
    start: 12
    end: 13 # Note, not 14! We're offsetting by graphemes not bytes
    href: example.com

Which would render something akin to the following markdown: **emoji link:** [👀](example.com)

Failing that, does lexical expose codepoints? That's my backup option right now.