// TODO: Create unit-test-friendly wrappers for all async Linq extension methods
public static async Task <int> CountAsyncOk <T>(
this IQueryable <T> query,
CancellationToken cancellationToken = default)
=>
query.Provider.GetType() == typeof(NHibernate.Linq.DefaultQueryProvider) ?
await LinqExtensionMethods.CountAsync(query, cancellationToken)
:
query.Count();