import ( "github.com/coreos/etcd/raft/raftpb" "encoding/json" ) func main() { // create a configuration change cc := raftpb.ConfChange{ Type: raftpb.ConfChangeAddNode, NodeID: 2, Context: []byte("node2"), } // serialize the configuration change data, err := json.Marshal(cc) if err != nil { // handle error } // deserialize the configuration change var cc2 raftpb.ConfChange if err := json.Unmarshal(data, &cc2); err != nil { // handle error } }In this example, we create a ConfChange object with the Type set to ConfChangeAddNode, NodeID set to 2, and Context set to the byte array "node2". We then use the json.Marshal function to serialize the ConfChange into a byte array, and json.Unmarshal to deserialize it back into a ConfChange object. The package library is github.com.coreos.etcd.raft.raftpb.