var go.opentelemetry.io/otel/trace.nilSpanID

3 uses

	go.opentelemetry.io/otel/trace (current package)
		trace.go#L78: 	nilSpanID SpanID
		trace.go#L79: 	_         json.Marshaler = nilSpanID
		trace.go#L85: 	return !bytes.Equal(s[:], nilSpanID[:])