| context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| errors | Package errors implements functions to manipulate errors. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| google.golang.org/grpc/codes | |
| google.golang.org/grpc/credentials | |
| google.golang.org/grpc/credentials/alts/internal | |
| google.golang.org/grpc/credentials/alts/internal/handshaker | |
| google.golang.org/grpc/credentials/alts/internal/handshaker/service | |
| google.golang.org/grpc/credentials/alts/internal/proto/grpc_gcp | |
| google.golang.org/grpc/grpclog | |
| google.golang.org/grpc/peer | |
| google.golang.org/grpc/status | |
| io | Package io provides basic interfaces to I/O primitives. |
| io/ioutil | Package ioutil implements some I/O utility functions. |
| log | Package log implements a simple logging package. |
| net | Package net provides a portable interface for network I/O, including TCP/IP, UDP, domain name resolution, and Unix domain sockets. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| os/exec | Package exec runs external commands. |
| regexp | Package regexp implements regular expression search. |
| runtime | Package runtime contains operations that interact with Go's runtime system, such as functions to control goroutines. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |
| time | Package time provides functionality for measuring and displaying time. |