-static void get_prop(BonoboPropertyBag*, BonoboArg *, guint , CorbaEnvironment*, gpointer);
-static void set_prop(BonoboPropertyBag*, BonoboArg *, guint , CorbaEnvironment*, gpointer);
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-static BonoboControl* instantiate_func(void);
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-static void notify_property_bag(GtkMathView* ,gpointer);