| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| google.golang.org/grpc/attributes | Package attributes defines a generic key/value store used in various gRPC components. |
| google.golang.org/grpc/internal | Package internal contains gRPC-internal code, to avoid polluting the godoc of the top-level grpc package. |
| google.golang.org/grpc/internal/xds/clients | Package clients provides implementations of the clients to interact with xDS and LRS servers. |
| google.golang.org/grpc/resolver | Package resolver defines APIs for name resolution in gRPC. |