| encoding/json | Package json implements encoding and decoding of JSON as defined in RFC 7159. |
| 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/attributes | Package attributes defines a generic key/value store used in various gRPC components. |
| google.golang.org/grpc/balancer | Package balancer defines APIs for load balancing in gRPC. |
| google.golang.org/grpc/connectivity | Package connectivity defines connectivity semantics. |
| google.golang.org/grpc/internal/buffer | Package buffer provides an implementation of an unbounded buffer. |
| 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/resolver | Package resolver defines APIs for name resolution in gRPC. |
| google.golang.org/grpc/serviceconfig | Package serviceconfig defines types and methods for operating on gRPC service configs. |
| google.golang.org/grpc/xds/internal | Package internal contains functions/structs shared by xds balancers/resolvers. |
| google.golang.org/grpc/xds/internal/balancer/edsbalancer | |
| google.golang.org/grpc/xds/internal/client | |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |