where is ListBase?

[Tliens]

case .object:
/// We may get List here
/// The item cannot be casted as List
/// It can be casted at a low-level type ListBase
guard let list = item as? ListBase, list.count > 0 else { break }
var referenceArray = CKRecord.Reference
let wrappedArray = list._rlmArray

[Tliens]

realm version