| context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| 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. |
| github.com/golang/protobuf/proto | Package proto provides functionality for handling protocol buffer messages. |
| github.com/golang/protobuf/ptypes | Package ptypes provides functionality for interacting with well-known types. |
| github.com/golang/protobuf/ptypes/struct | |
| google.golang.org/grpc | Package grpc implements an RPC system called gRPC. |
| google.golang.org/grpc/balancer | Package balancer defines APIs for load balancing in gRPC. |
| google.golang.org/grpc/balancer/xds/edsbalancer | |
| google.golang.org/grpc/balancer/xds/internal/proto/envoy/api/v2/cds | |
| google.golang.org/grpc/balancer/xds/internal/proto/envoy/api/v2/core/base | |
| google.golang.org/grpc/balancer/xds/internal/proto/envoy/api/v2/discovery | |
| google.golang.org/grpc/balancer/xds/internal/proto/envoy/api/v2/eds | |
| google.golang.org/grpc/balancer/xds/internal/proto/envoy/service/discovery/v2/ads | |
| google.golang.org/grpc/connectivity | Package connectivity defines connectivity semantics. |
| google.golang.org/grpc/grpclog | Package grpclog defines logging for grpc. |
| google.golang.org/grpc/internal/backoff | Package backoff implement the backoff strategy for gRPC. |
| google.golang.org/grpc/internal/channelz | Package channelz defines internal APIs for enabling channelz service, entry registration/deletion, and accessing channelz data. |
| google.golang.org/grpc/resolver | Package resolver defines APIs for name resolution in gRPC. |
| reflect | Package reflect implements run-time reflection, allowing a program to manipulate objects with arbitrary types. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |
| time | Package time provides functionality for measuring and displaying time. |