eager
fun <T> List<T>.eagerDeserialise(onError: (TransactionDeserialisationException, Int) -> T? = { ex, _ -> throw ex })
Iterate over a LazyMappedList, forcing it to transform all of its elements immediately. This transformation is assumed to be "deserialisation". Does nothing for any other kind of List. WARNING: Any changes made to the LazyMappedList contents are PERMANENT!