ftp.nice.ch/pub/next/connectivity/protocol/PPPMeter.v1.5.NIHS.bs.tar.gz#/PPPMeter.v1.5/Source/Boolean.h

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#import <objc/Object.h>

@protocol BooleanProtocol

- (void) setBoolState: (BOOL) aValue;
- (BOOL) boolState;

@end


@interface Boolean : Object <BooleanProtocol>
{
   BOOL boolState;
   id delegate;
}

- init;

- setDelegate: anObject;
- delegate;

@end

@interface Boolean (BooleanDelegate)

- (void) boolStateSetTo: (BOOL) aValue;

@end

These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Marcel Waldvogel and Netfuture.ch.