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73 
74 #include <qglobal.h>
75 #import <objc/objc-class.h>
76 
77 QT_BEGIN_NAMESPACE
78 
79 void qt_cocoa_change_implementation(Class baseClass, SEL originalSel, Class proxyClass, SEL replacementSel = nil, SEL backupSel = nil);
80 void qt_cocoa_change_back_implementation(Class baseClass, SEL originalSel, SEL backupSel);
81 
82 QT_END_NAMESPACE
83