How to set text of SourceBuffer or TextBuffer


I have code snippet like this:

source_buffer =
source_buffer.text = “Yada yada\nya”

This used to work but no longer works.

Does someone know how to set the text content of a SourceBuffer widget
or a TextBuffer widget?

Ah, it works when I do:

require ‘gtksourceview2’

Hmm… wondering whether TextBuffer does not allow that by default