GtkRadioAction object. To add the action to
a GtkActionGroup and set the accelerator for the action,
call gtkActionGroupAddActionWithAccel.gtkRadioActionNew(name = NULL, label = NULL, tooltip = NULL,  stock.id = NULL, value = NULL)namelabelNULL. [  allow-none  ]tooltipNULL. [  allow-none  ]stock.idNULLvaluegtkRadioActionGetCurrentValue should
return if this action is selected.GtkRadioAction] a new GtkRadioAction