No documentation for source generated Metering

[petrroll]

There's no documentation for source generated metering. There are docs for metering generally (Creating Metrics - .NET | Microsoft Learn) but nothing for source generated metering.

Looking at source code (here extensions/src/Generators/Microsoft.Gen.Metrics at main · dotnet/extensions )I was able to find the relevant attribute names but that's really not a good substitute. Especially if one doesn't even know the capability is there.

Furthemore, I'm puzzled by the resulting metrics now accepting arguments (for dimensions) of type object instead of (expected) string.