Imports github.com/felixge/httpsnoop github.com/gorilla/mux go.opentelemetry.io/otel go.opentelemetry.io/otel/propagation go.opentelemetry.io/otel/semconv/v1.17.0 go.opentelemetry.io/otel/semconv/v1.17.0/httpconv go.opentelemetry.io/otel/trace Standard library imports fmt net/http sync