clientv3: s/ToOpResponse/OpResponse

Closer to idiomatic go.

clientv3/kv.go

@@ -74,16 +74,16 @@ func (op OpResponse) Get() *GetResponse    { return op.get }
 func (op OpResponse) Del() *DeleteResponse { return op.del }
 func (op OpResponse) Txn() *TxnResponse    { return op.txn }
 
-func (resp *PutResponse) ToOpResponse() OpResponse {
+func (resp *PutResponse) OpResponse() OpResponse {
 	return OpResponse{put: resp}
 }
-func (resp *GetResponse) ToOpResponse() OpResponse {
+func (resp *GetResponse) OpResponse() OpResponse {
 	return OpResponse{get: resp}
 }
-func (resp *DeleteResponse) ToOpResponse() OpResponse {
+func (resp *DeleteResponse) OpResponse() OpResponse {
 	return OpResponse{del: resp}
 }
-func (resp *TxnResponse) ToOpResponse() OpResponse {
+func (resp *TxnResponse) OpResponse() OpResponse {
 	return OpResponse{txn: resp}
 }
 

clientv3/ordering/kv_test.go

@@ -195,7 +195,7 @@ var rangeTests = []struct {
 
 func TestKvOrdering(t *testing.T) {
 	for i, tt := range rangeTests {
-		mKV := &mockKV{clientv3.NewKVFromKVClient(nil), tt.response.ToOpResponse()}
+		mKV := &mockKV{clientv3.NewKVFromKVClient(nil), tt.response.OpResponse()}
 		kv := &kvOrdering{
 			mKV,
 			func(r *clientv3.GetResponse) OrderViolationFunc {
@@ -249,7 +249,7 @@ var txnTests = []struct {
 
 func TestTxnOrdering(t *testing.T) {
 	for i, tt := range txnTests {
-		mKV := &mockKV{clientv3.NewKVFromKVClient(nil), tt.response.ToOpResponse()}
+		mKV := &mockKV{clientv3.NewKVFromKVClient(nil), tt.response.OpResponse()}
 		kv := &kvOrdering{
 			mKV,
 			func(r *clientv3.TxnResponse) OrderViolationFunc {