Realm+CascadingDeletions

Realm+CascadingDeletions.swift

import Foundation
import RealmSwift

protocol CascadingDeletable {
    var cascadingDeletions: [AnyObject?] { get }
}

extension Realm {
    
    func delete<T: AnyObject>(cascading: List<T>) where T: CascadingDeletable {
        let o = cascading
        cascading.removeAll()
        delete(o)
    }
    
    func delete<T: AnyObject>(cascading: Results<T>) where T: CascadingDeletable {
        let o = cascading
        delete(o)
    }
    
    func delete<T: AnyObject>(cascading: [T]) where T: CascadingDeletable {
        for c in cascading {
            delete(c as! Object)
        }
    }
    
    func delete<T: AnyObject>(cascading: T) where T: Object, T: CascadingDeletable {
        
        for child in cascading.cascadingDeletions {
            if let object = child as? Object {
                delete(object)
            }
            if let cascade = child as? CascadingDeletable {
                delete(cascade as! Object)
            }
        }
        
        delete(cascading)
    }
}

Any solutions to this?