private static string ChangesSaved(EventDefinitionBase definition, EventData payload)
        {
            EventDefinition <int> d = (EventDefinition <int>)definition;
            SaveChangesEventData  p = (SaveChangesEventData)payload;

            return(d.GenerateMessage(p.RowsAffected));
        }
        /// <summary>
        ///     This is an internal API that supports the Entity Framework Core infrastructure and not subject to
        ///     the same compatibility standards as public APIs. It may be changed or removed without notice in
        ///     any release. You should only use it directly in your code with extreme caution and knowing that
        ///     doing so can result in application failures when updating to a new Entity Framework Core release.
        /// </summary>
        public static void ChangesSaved(
            this IDiagnosticsLogger <DbLoggerCategory.Update> diagnostics,
            IEnumerable <IUpdateEntry> entries,
            int rowsAffected)
        {
            var definition = InMemoryResources.LogSavedChanges(diagnostics);

            if (diagnostics.ShouldLog(definition))
            {
                definition.Log(diagnostics, rowsAffected);
            }

            if (diagnostics.NeedsEventData(definition, out var diagnosticSourceEnabled, out var simpleLogEnabled))
            {
                var eventData = new SaveChangesEventData(
                    definition,
                    ChangesSaved,
                    entries,
                    rowsAffected);

                diagnostics.DispatchEventData(definition, eventData, diagnosticSourceEnabled, simpleLogEnabled);
            }
        }