I would like to be able to replace only some handlers while keeping the default handlers enabled.

[niimima]

I would like to experimentally replace and implement some handlers. Currently, when I try to customize a handler, I have to disable all the default handlers and re-register everything from scratch. For example, as shown in this link [https://github.com/microsoft/kernel-memory/blob/main/examples/004-dotnet-serverless-custom-pipeline/Program.cs]:

var memoryBuilder = new KernelMemoryBuilder()
    .WithoutDefaultHandlers() // remove default handlers, added manually below
    .WithOpenAIDefaults(Environment.GetEnvironmentVariable("OPENAI_API_KEY")!);

var memory = memoryBuilder.Build<MemoryServerless>();

/*********************************************************
 * Define custom handlers
 *********************************************************/

Console.WriteLine("* Registering pipeline handlers...");

memory.Orchestrator.AddHandler<TextExtractionHandler>("extract_text");
memory.Orchestrator.AddHandler<TextPartitioningHandler>("split_text_in_partitions");
memory.Orchestrator.AddHandler<GenerateEmbeddingsHandler>("generate_embeddings");
memory.Orchestrator.AddHandler<SummarizationHandler>("summarize");
memory.Orchestrator.AddHandler<SaveRecordsHandler>("save_memory_records");

// ...

I only want to customize some of the handlers, but re-registering all handlers is cumbersome. Would it be possible to do something like the following?

var memoryBuilder = new KernelMemoryBuilder() 
    .WithOpenAIDefaults(Environment.GetEnvironmentVariable("OPENAI_API_KEY")!);

var memory = memoryBuilder.Build<MemoryServerless>();

// Register only the handlers I want to override
memory.Orchestrator.OverridesHandler<CustomSaveRecordsHandler>("save_memory_records");

I would also be happy if this approach could be used for asynchronous memory custom pipelines as well, not just serverless ones.
[https://github.com/microsoft/kernel-memory/tree/main/examples/005-dotnet-async-memory-custom-pipeline]