| context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| flag | Package flag implements command-line flag parsing. |
| google.golang.org/grpc | Package grpc implements an RPC system called gRPC. |
| google.golang.org/grpc/credentials/alts | Package alts implements the ALTS credential support by gRPC library, which encapsulates all the state needed by a client to authenticate with a server using ALTS and make various assertions, e.g., about the client's identity, role, or whether it is authorized to make a particular call. |
| google.golang.org/grpc/grpclog | Package grpclog defines logging for grpc. |
| google.golang.org/grpc/interop | Package interop contains functions used by interop client/server. |
| google.golang.org/grpc/interop/grpc_testing | |
| google.golang.org/grpc/tap | Package tap defines the function handles which are executed on the transport layer of gRPC-Go and related information. |
| net | Package net provides a portable interface for network I/O, including TCP/IP, UDP, domain name resolution, and Unix domain sockets. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |