server.go
func (c *Client) GetAttachedVolume(dcid, srvid, volid string) (*Volume, error) {
	url := serverVolumePath(dcid, srvid, volid) + `?depth=` + c.client.depth + `&pretty=` + strconv.FormatBool(c.client.pretty)
	ret := &Volume{}
	err := c.client.Get(url, ret, http.StatusOK)

	return ret, err
}
func (c *Client) GetAttachedVolume(dcid, srvid, volid string) (*Volume, error) {
	url := serverVolumePath(dcid, srvid, volid) + `?depth=` + c.client.depth + `&pretty=` + strconv.FormatBool(c.client.pretty)
	ret := &Volume{}
	err := c.client.Get(url, ret, http.StatusOK)

	return ret, err
}
//GetAttachedVolume gets an attached volume