gtkToggleToolButtonNew(show = TRUE)
gtkToggleToolButtonNewFromStock(stock.id)
gtkToggleToolButtonSetActive(object, is.active)
gtkToggleToolButtonGetActive(object)
gtkToggleToolButton(show = TRUE)GtkToggleToolButton is a GtkToolItem that contains a toggle
  button.
  
  Use gtkToggleToolButtonNew to create a new
  GtkToggleToolButton. Use gtkToggleToolButtonNewFromStock to
  create a new GtkToggleToolButton containing a stock item.gtkToggleToolButton is the equivalent of gtkToggleToolButtonNew.