WebKitのWebHTMLView.m のソースの中に // Kill ring calls. Would be better to use NSKillRing.h, but that's not available in SPI. void _NSInitializeKillRing(void); void _NSAppendToKillRing(NSString *); void _NSPrependToKillRing(NSString *); NSString *_NSYankFromKillRing(void); NSString *_NSYankPreviousFromKillRing(void); void _NSNewKillRingSequence(void); void _NSSetKillRingToYankedState(void); void _NSReset