| bytes | Package bytes implements functions for the manipulation of byte slices. |
| context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| github.com/coreos/etcd/clientv3 | clientv3 is the official Go etcd client for v3. |
| github.com/coreos/etcd/etcdserver/api/v3rpc/rpctypes | |
| github.com/coreos/etcd/etcdserver/etcdserverpb | Package etcdserverpb is a generated protocol buffer package. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |