Imports go.opentelemetry.io/otel/api/global go.opentelemetry.io/contrib go.opentelemetry.io/otel/api/trace go.opentelemetry.io/otel/codes go.opentelemetry.io/otel/label go.opentelemetry.io/otel/semconv github.com/bradfitz/gomemcache/memcache Standard library imports context