public async Task SaveAsync(INonTerminalDescriptor descriptor, ICollectionRetrievalContext <TData> retrievalContext, Action doAfterDataAdded)
{
Compositions.Save(descriptor, Describe(retrievalContext.Data));
await SaveAsync(retrievalContext, () =>
{
Compositions.Save(descriptor, Describe(retrievalContext.Data));
doAfterDataAdded?.Invoke();
});
}