realm-cocoa

I am using a Realm List/Results as my dataSource for a UITableView . At some point I assign a list to it. like: var dataSource:List<SomeObject>! // Or >> Results<SomeObject>! let aRealmObject = realm.objectForPrimaryKey(SomeObject.self, key: objectId) dataSource = aRealmObject.someList // dataSource should be List Then I have a filter on this list If the user changed the filter dates, I do like this: dataSource = dataSource.filter("FILTER THE DATES",newDates) // dataSource should be Results But the line above causes an error as the return type of filter is a Results object and aRealmObject