Imports go.opentelemetry.io/otel go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc go.opentelemetry.io/otel/propagation go.opentelemetry.io/otel/sdk/resource go.opentelemetry.io/otel/sdk/trace go.opentelemetry.io/otel/semconv/v1.17.0 Standard library imports context fmt