@class NSFileHandle; @interface NSConcretePipe : NSPipe { NSFileHandle *_readHandle; NSFileHandle *_writeHandle; } - (id)init; - (void)dealloc; - (id)fileHandleForWriting; - (void)_closeOnDealloc; - (id)fileHandleForReading; - (id)copyWithZone:(struct _NSZone { } *)a0; @end