| 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. |
| google.golang.org/grpc | Package grpc implements an RPC system called gRPC. |
| google.golang.org/grpc/grpclog | Package grpclog defines logging for grpc. |
| google.golang.org/grpc/internal/grpclog | Package grpclog provides logging functionality for internal gRPC packages, outside of the functionality provided by the external `grpclog` package. |
| google.golang.org/grpc/internal/grpcsync | Package grpcsync implements additional synchronization primitives built upon the sync package. |
| google.golang.org/grpc/xds/internal/balancer | Package balancer installs all the xds balancers. |
| google.golang.org/grpc/xds/internal/client | |
| google.golang.org/grpc/xds/internal/client/bootstrap | |
| google.golang.org/grpc/xds/internal/client/v2 | |
| google.golang.org/grpc/xds/internal/client/v3 | |
| google.golang.org/grpc/xds/internal/resolver | Package resolver implements the xds resolver, that does LDS and RDS to find the cluster to use. |
| net | Package net provides a portable interface for network I/O, including TCP/IP, UDP, domain name resolution, and Unix domain sockets. |
| strconv | Package strconv implements conversions to and from string representations of basic data types. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |