go-ceph: rbd stat not returning the parent image name

Not able to get the parent image name from the image stat. executed below go program to get image stat

Tested with go-ceph 0.3

package main

import (
	"fmt"

	"github.com/ceph/go-ceph/rados"
	"github.com/ceph/go-ceph/rbd"
)

const (
	poolname   = "replicapool"
)

func create_conn() (conn *rados.Conn, err error) {
	conn, err = rados.NewConn()
	if err != nil {
		return nil, fmt.Errorf("Error creating NewConn (%v)\n", err)
	}

	baseArgs := []string{
		"-m", "10.105.235.252:6789",
		"--id", "admin",
		"--key=" +"AQBAgOxexraiLxAAH3YLTTXjXLLaxLRGk6szMw==",
		"-c", "/etc/ceph/ceph.conf",
	}

	err = conn.ParseCmdLineArgs(baseArgs)
	if err != nil {
		return nil, fmt.Errorf("Error updating connection with args (%v) (%v)", baseArgs, err)
	}

	err = conn.Connect()
	if err != nil {
		return nil, fmt.Errorf("Error connecting to Ceph cluster (%v). Connection args (%+v)", err, baseArgs)
	}

	return
}

func main(){
	conn, err := create_conn()
	if err != nil {
		fmt.Printf("Error creating connection (%v)", err)
	}
	defer conn.Shutdown()

	ioctx, err := conn.OpenIOContext(poolname)
	if err != nil {
		fmt.Printf("Error creating IO context (%v)", err)
	}
	defer ioctx.Destroy()
	name:="csi-snap-0ac326e1-b212-11ea-b8ec-0242ac110010"
	image := rbd.GetImage(ioctx, name)
	if image == nil {
		fmt.Printf("Error getting image handle (%v)", err)
	}

	err = image.Open()
	if err != nil {
		fmt.Printf("Error opening image (%v)", err)
	}

	s, err := image.Stat()
	if err != nil {
		image.Close()
		fmt.Printf("Error fetching image info (%v)", err)
	}
	fmt.Printf("image stats for %s is %+v\n",name,s)
}

sh-4.4# ./main 
image stats for csi-snap-0ac326e1-b212-11ea-b8ec-0242ac110010 is &{Size:1073741824 Obj_size:4194304 Num_objs:256 Order:22 Block_name_prefix:rbd_data.1342dd18e86f Parent_pool:-1 Parent_name:}

Image info for same image from ceph cluster

sh-4.2# rbd info csi-snap-0ac326e1-b212-11ea-b8ec-0242ac110010 --pool=replicapool --format=json |python -mjson.tool
{
    "access_timestamp": "Fri Jun 19 09:48:35 2020",
    "block_name_prefix": "rbd_data.1342dd18e86f",
    "create_timestamp": "Fri Jun 19 09:48:35 2020",
    "features": [
        "layering",
        "deep-flatten",
        "operations"
    ],
    "flags": [],
    "format": 2,
    "id": "1342dd18e86f",
    "modify_timestamp": "Fri Jun 19 09:48:35 2020",
    "name": "csi-snap-0ac326e1-b212-11ea-b8ec-0242ac110010",
    "object_size": 4194304,
    "objects": 256,
    "op_features": [
        "clone-child"
    ],
    "order": 22,
    "parent": {
        "id": "1122bee6774f",
        "image": "csi-vol-82f6ec77-b20d-11ea-8d70-0242ac110010",
        "overlap": 1073741824,
        "pool": "replicapool",
        "pool_namespace": "",
        "snapshot": "42f2a80e-2c63-4498-9776-c5e7204d31ec",
        "trash": false
    },
    "size": 1073741824,
    "snapshot_count": 1
}

Expected Result:

The image stat should return the parent image name