Answer Posted / Apurav Garg

"In iOS, to create a fetched property, you need to define it in the entity's managed object subclass. Here is an example:

```swift
import Foundation
import CoreData

@objc(YourEntity)
public class YourEntity: NSManagedObject {
@NSManaged public var propertyA: String?
@dynamic public var fetchedPropertyB: [YourOtherEntity]?
}

let fetchRequest = NSFetchRequest<YourOtherEntity>(entityName: "YourOtherEntity")
fetchedPropertyB = try? YourEntity.fetch(fetchRequest)
```"

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