1.1.8.3. osx.ObjCProperty (ObjC)
Check for proper uses of Objective-C properties.

Examples:

NSNumber *photoCount = [albumDescriptor objectForKey:@"PhotoCount"];
// Warning: Comparing a pointer value of type 'NSNumber *'
// to a scalar integer value
if (photoCount > 0) {
  [self displayPhotos];
}