| bytes | Package bytes implements functions for the manipulation of byte slices. |
| context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| encoding/binary | Package binary implements simple translation between numbers and byte sequences and encoding and decoding of varints. |
| flag | Package flag implements command-line flag parsing. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/lightstep/lightstep-tracer-go/lightstepoc | Package lightstepoc provides an OpenCensus exporter for sending OpenCensus spans back to LightStep. |
| go.opencensus.io/trace | Package trace contains support for OpenCensus distributed tracing. |
| log | Package log implements a simple logging package. |
| time | Package time provides functionality for measuring and displaying time. |