System/Library/PrivateFrameworks/AXSpringBoardServerInstance.framework
AXSecureWindow.h
@interface AXSecureWindow : UIWindow
+ (BOOL)_isSecure;
@end
System/Library/PrivateFrameworks/AXSpringBoardServerInstance.framework
@interface AXSecureWindow : UIWindow
+ (BOOL)_isSecure;
@end