| context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| golang.org/x/net/http2 | Package http2 implements the HTTP/2 protocol. |
| google.golang.org/grpc | |
| google.golang.org/grpc/connectivity | |
| google.golang.org/grpc/credentials/insecure | |
| google.golang.org/grpc/interop/grpc_testing | |
| google.golang.org/grpc/resolver | |
| google.golang.org/grpc/resolver/manual | |
| google.golang.org/grpc/serviceconfig | |
| net | Package net provides a portable interface for network I/O, including TCP/IP, UDP, domain name resolution, and Unix domain sockets. |
| net/http | Package http provides HTTP client and server implementations. |
| testing | Package testing provides support for automated testing of Go packages. |
| time | Package time provides functionality for measuring and displaying time. |