val message_tag = buffer#create_tag []
val debug_tag = buffer#create_tag [ `FOREGROUND "#888888" ]
method message s = buffer#insert ~iter:buffer#end_iter ~tags:[message_tag] s
val message_tag = buffer#create_tag []
val debug_tag = buffer#create_tag [ `FOREGROUND "#888888" ]
method message s = buffer#insert ~iter:buffer#end_iter ~tags:[message_tag] s