Imports of package internal

PathSynopsis
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
github.com/envoyproxy/go-control-plane/envoy/config/core/v3
google.golang.org/grpc/xds/internal/clientsPackage clients provides implementations of the clients to interact with xDS and LRS servers.
google.golang.org/protobuf/protoPackage proto provides functions operating on protocol buffer messages.
google.golang.org/protobuf/types/known/structpbPackage structpb contains generated types for google/protobuf/struct.proto.
stringsPackage strings implements simple functions to manipulate UTF-8 encoded strings.