CodeHighlighter's set_text_edit Inaccessible Through GDExtension

[Pspritechologist]

As best as I can tell, current EditorSyntaxHighlighters pretty much all effectively wrap CodeHighlighters internally, simply calling set_text_edit on them with the TextEdit in question to get accurate information. This method doesn't appear to be exposed to either GDScript or GDExtension, making creating additional editor highlighters using them seemingly impossible. This means any extension wanting to implement a new highlighter needs to implement all the functionality from scratch.
I think it would be beneficial to see this method exposed.

I apologize if there's another way to achieve this, I wasn't able to find one myself.