Variables 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 var ( // ErrUnsupportedFormat occurs when the `format` passed to Tracer.Inject() or // Tracer.Extract() is not recognized by the Tracer implementation. ErrUnsupportedFormat = errors.New("opentracing: Unknown or unsupported Inject/Extract format") // ErrSpanContextNotFound occurs when the `carrier` passed to // Tracer.Extract() is valid and uncorrupted but