如何在zookeeper中清除数据节点的所有子节点，而不删除数据节点本身？

import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.retry.ExponentialBackoffRetry;
import org.apache.zookeeper.KeeperException;
import java.util.List;

public class ZooKeeperNodeCleanup {
    private static final String ZK_CONNECTION_STRING = "localhost:2181";
    private static final int ZK_SESSION_TIMEOUT_MS = 5000;

    public static void main(String[] args) {
        CuratorFramework client = CuratorFrameworkFactory.newClient(ZK_CONNECTION_STRING,
                new ExponentialBackoffRetry(ZK_SESSION_TIMEOUT_MS, 3));
        client.start();

        String parentNodePath = "/path/to/parent/node";
        try {
            List<String> children = client.getChildren().forPath(parentNodePath);
            for (String child : children) {
                String childNodePath = parentNodePath + "/" + child;
                client.delete().forPath(childNodePath);
            }
        } catch (KeeperException.NoNodeException e) {
            System.out.println("Parent node does not exist.");
        } catch (Exception e) {
            System.out.println("Failed to delete child nodes: " + e.getMessage());
        } finally {
            client.close();
        }
    }
}