| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/uber/tchannel-go | Package tchannel implements Go bindings for the TChannel protocol (https://github.com/uber/tchannel). |
| golang.org/x/net/context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| reflect | Package reflect implements run-time reflection, allowing a program to manipulate objects with arbitrary types. |
| time | Package time provides functionality for measuring and displaying time. |