extern static void CFSetApplyFunction(CFSetRef theSet, CFSetApplierFunction applier, IntPtr context);
extern static void CFSetApplyFunction(CFSetRef theSet, CFSetApplierFunction applier, IntPtr context);
extern static void CFSetApplyFunction(CFSetRef theSet, CFSetApplierFunction applier, IntPtr context);
extern static void CFSetApplyFunction(CFSetRef theSet, CFSetApplierFunction applier, IntPtr context);