var DJITermsNotificationController = ObjC.classes.DJITermsNotificationController; var shouldShowTerms = DJITermsNotificationController['- shouldShowTerms']; var shouldShowTermsImpl = shouldShowTerms.implementation; shouldShowTerms.implementation = ObjC.implement(shouldShowTerms, function (handle, selector) { var originalResult = shouldShowTermsImpl(handle, selector); console.log('Original says:', originalResult, 'we say: false'); return false; });