| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/pkg/errors | Package errors provides simple error handling primitives. |
| github.com/uber/jaeger-client-go | Package jaeger implements an OpenTracing (http://opentracing.io) Tracer. |
| github.com/uber/jaeger-client-go/utils | |
| net/url | Package url parses URLs and implements query escaping. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |
| sync/atomic | Package atomic provides low-level atomic memory primitives useful for implementing synchronization algorithms. |
| time | Package time provides functionality for measuring and displaying time. |