使jxBrowser在当前窗口中打开弹出窗口，而不是“弹出”

import com.teamdev.jxbrowser.browser.Browser;
import com.teamdev.jxbrowser.browser.callback.PopupWindowCallback;
import com.teamdev.jxbrowser.engine.Engine;
import com.teamdev.jxbrowser.engine.RenderingMode;
import com.teamdev.jxbrowser.view.swing.BrowserView;

import javax.swing.*;
import java.awt.*;

public class PopupWindowExample {
    public static void main(String[] args) {
        Engine engine = Engine.newInstance(RenderingMode.OFF_SCREEN);
        Browser browser = engine.newBrowser();

        // 设置弹出窗口策略为在当前窗口中打开
        browser.set(PopupWindowCallback.class, params -> {
            Browser popupBrowser = engine.newBrowser();
            BrowserView popupView = BrowserView.newInstance(popupBrowser);
            JFrame popupFrame = new JFrame();
            popupFrame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
            popupFrame.add(popupView, BorderLayout.CENTER);
            popupFrame.setSize(800, 600);
            popupFrame.setLocationRelativeTo(browser.getView().getComponent());
            popupFrame.setVisible(true);
            return true;
        });

        BrowserView view = BrowserView.newInstance(browser);
        JFrame frame = new JFrame("jxBrowser Popup Window Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(view, BorderLayout.CENTER);
        frame.setSize(800, 600);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);

        browser.navigation().loadUrl("https://example.com");
    }
}