anchor.diff:      return _trackFuture('clearVMTimeline', _vmService.clearVMTimeline());
     }
   
  +  @deprecated
     @override
     Future<Success> collectAllGarbage(String isolateId) {
  -    return _trackFuture(
  -        'collectAllGarbage', _vmService.collectAllGarbage(isolateId));
  +    throw UnsupportedError('Private service RPC');
     }
   
     @override
  
positive.code:     );
    }
  
    @override
    Future<CpuProfile> getCpuProfile(String isolateId, String tags) {
      return _trackFuture(
          'getCpuProfile', _vmService.getCpuProfile(isolateId, tags));
    }
  
    // TODO(kenzie): keep track of all private methods we are currently using to
  
negative.code: 
    @override
    Future<Success> clearCpuProfile(String isolateId) {
      return _trackFuture('clearCpuProfile',
          callMethod('_clearCpuProfile', isolateId: isolateId));
    }
  
    @override
  