public System.Collections.IEnumerator GetPersistedStateAsync(System.Action <PersistedState> process)
{
PersistedState state = new PersistedState();
state.version = PersistedState.CurrentVersion;
state.cellString = null;
Debug.Assert(terrainV2 != null, "terrainV2 was null?");
yield return(terrainV2.SerializeAsync(bytes => state.v2Data = ToBase64(bytes)));
state.metadata = GetMetadata();
process(state);
}