namespace Microsoft.EntityFrameworkCore
{
    public abstract class OptimisticConcurrencyTestBase<TFixture, TRowVersion> : Object, IClassFixture<TFixture>
        where TFixture, new(), F1FixtureBase<TRowVersion>
    {
        [AsyncStateMachine(typeof(<ConcurrencyTestAsync>d__46<?>))]
        protected virtual Task ConcurrencyTestAsync<TException>(Action<F1Context> storeChange, Action<F1Context> clientChange, Action<F1Context, TException> resolver, Action<F1Context> validator)
            where TException, DbUpdateException;
    }
}