func (l *dataListener) AddInterestedURL(url *common.URL) {
	l.interestedURL = append(l.interestedURL, url)
}
AddInterestedURL adds a registration @url to listen
package etcdv3
import (
	"strings"
	"sync"
)
import (
	gxchan "github.com/dubbogo/gost/container/chan"
	perrors "github.com/pkg/errors"
)
import (
	"dubbo.apache.org/dubbo-go/v3/common"
	"dubbo.apache.org/dubbo-go/v3/common/logger"
	"dubbo.apache.org/dubbo-go/v3/config_center"
	"dubbo.apache.org/dubbo-go/v3/registry"
	"dubbo.apache.org/dubbo-go/v3/remoting"
)
type dataListener struct {
	interestedURL []*common.URL
	listener      config_center.ConfigurationListener
}
func NewRegistryDataListener(listener config_center.ConfigurationListener) *dataListener {
	return &dataListener{listener: listener}
}