Deletes current contents of buffer, and inserts text instead. This is
automatically marked as an irreversible action in the undo stack. If you
wish to mark this action as part of a larger undo operation, call
gtk.text_buffer.TextBuffer.delete_ and gtk.text_buffer.TextBuffer.insert directly instead.
If len is -1, text must be nul-terminated.
text must be valid UTF-8.
Deletes current contents of buffer, and inserts text instead. This is automatically marked as an irreversible action in the undo stack. If you wish to mark this action as part of a larger undo operation, call gtk.text_buffer.TextBuffer.delete_ and gtk.text_buffer.TextBuffer.insert directly instead.
If len is -1, text must be nul-terminated. text must be valid UTF-8.