WithDecider gone but referenced on documentation

[JosemyDuarte]

Hi!

I'm migrating from 1.4.0 to 2.1.0 and we were using WithDecider. I see it still referenced on the documentation

go-grpc-middleware/interceptors/logging/doc.go

Lines 12 to 14 in 7da22cf

	All logging middleware will emit a final log statement. It is based on the error returned by the handler function,
	the gRPC status code, an error (if any) and it emits at a level controlled via `WithLevels`. You can control this behavior
	using `WithDecider`.

But is not implemented anywhere, what is the advisable way to accomplish similar results with v2 API? I would be happy to update the docs with this information as well.

[JosemyDuarte]

Somehow I missed this from the README

All "deciders", so functions that decide what to do based on gRPC service name and method (aka "fullMethodName") are removed (!). Use github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors/selector interceptor to select what method, type or service should use what interceptor.

I guess the doc should be updated with it, but I'm still about to investigate how to use the Selector as a replacement of WithDecider since I don't see err on CallMeta.

This is what I'm trying to translate to Selector approach:

loggingOpts := []grpczap.Option{
		grpczap.WithDecider(func(fullMethodName string, err error) bool {
			// Only log errors
			return err != nil
		}),
}