public static void EntityEntryHandledByHandler <TEntity>(
     ILogger logger,
     IConcurrencyErrorHandler <TEntity> handler)
 => _entityEntryHandledByHandler.Invoke(
     logger,
     handler);
 public static void ConcurrencyErrorHandlerExecuting <TEntity>(
     ILogger logger,
     IConcurrencyErrorHandler <TEntity> handler)
 => _concurrencyErrorHandlerExecuting.Invoke(
     logger,
     handler);