onModifiedChanged  
  fun onModifiedChanged(connectFlags: <Error class: unknown class> = ConnectFlags(0u), handler: () -> Unit): <Error class: unknown class>(source)
Emitted when the modified bit of a GtkTextBuffer flips.
See also: method@Gtk.TextBuffer.set_modified.
Parameters
connectFlags 
a combination of ConnectFlags
handler
the Callback to connect