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#if __has_attribute(__objc_designated_initializer__)
# define OF_DESIGNATED_INITIALIZER \
__attribute__((__objc_designated_initializer__))
#else
# define OF_DESIGNATED_INITIALIZER
#endif
#ifdef __GNUC__
#if defined(__clang__) || OF_GCC_VERSION >= 405
# define OF_DEPRECATED(project, major, minor, msg) \
__attribute__((__deprecated__("Deprecated in " #project " " \
#major "." #minor ": " msg)))
#elif defined(__GNUC__)
# define OF_DEPRECATED(project, major, minor, msg) \
__attribute__((__deprecated__))
#else
# define OF_DEPRECATED(project, major, minor, msg)
#endif
#if __has_attribute(__objc_boxable__)
# define OF_BOXABLE __attribute__((__objc_boxable__))
#else
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