Imports go.opentelemetry.io/otel go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc go.opentelemetry.io/otel/sdk/resource go.opentelemetry.io/otel/sdk/trace go.opentelemetry.io/otel/semconv/v1.4.0 go.opentelemetry.io/otel/trace google.golang.org/grpc Standard library imports context