internal static IImmutableDictionary <string, IValue?> GetUpdatedRawStates(
this IAccountStateDelta delta) =>
delta.GetUpdatedStates()
.Select(pair =>
new KeyValuePair <string, IValue?>(
ToStateKey(pair.Key),
pair.Value))
.Union(
delta.GetUpdatedBalances().Select(pair =>
new KeyValuePair <string, IValue?>(
ToFungibleAssetKey(pair.Key),
(Integer)pair.Value.RawValue))).ToImmutableDictionary();