MetricFilter status

[jack-berg]

The metrics SDK has a concept called a MetricFilter. Has anyone landed a prototype implementation of this?

I believe this is the relevant line from the spec compliance matrix, and it shows no entries.

Bringing this up because there's been recent conversations about finishing what we start, or acknowledging when there isn't enough interest in an idea and cleaning up unfinished ideas.

[marcalff]

opentelemetry-cpp has implemented it:

• [SDK] Implement spec: MetricFilter opentelemetry-cpp#3235

but the compliance matrix was not updated.