signal callback delegate or function to connect
void callback(gtk.text_iter.TextIter begin, gtk.text_iter.TextIter end, gtksource.vim_imcontext.VimIMContext vimIMContext)
begin the start location (optional)
end the end location (optional)
vimIMContext the instance the signal is connected to (optional)
Yes.After to execute callback after default handler, No.After to execute before (default)
Signal ID
Connect to FormatText signal.
Requests that the application format the text between begin and end.