| errors | Package errors implements functions to manipulate errors. |
| github.com/openzipkin/zipkin-go/model | Package model contains the Zipkin V2 model which is used by the Zipkin Go tracer implementation. |
| github.com/openzipkin/zipkin-go/propagation | Package propagation holds the required function signatures for Injection and Extraction as used by the Zipkin Tracer. |
| google.golang.org/grpc/metadata | Package metadata define the structure of the metadata supported by gRPC library. |
| net/http | Package http provides HTTP client and server implementations. |
| strconv | Package strconv implements conversions to and from string representations of basic data types. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |