Imports go.opentelemetry.io/otel/attribute go.opentelemetry.io/otel/metric go.opentelemetry.io/otel/metric/number go.opentelemetry.io/otel/sdk/resource Imports in module “go.opentelemetry.io/otel/sdk/export/metric” go.opentelemetry.io/otel/sdk/export/metric go.opentelemetry.io/otel/sdk/export/metric/aggregation Standard library imports context errors reflect sync time