Consider the following code snippet:

Consider the following code snippet:

String mainWindow = driver.getWindowHandle();
Set allWindows = driver.getWindowHandles();
for (String window : allWindows) {
    if (!window.equals(mainWindow)) {
        driver.switchTo().window(window);
        driver.close();
    }
}
driver.switchTo().window(mainWindow);
System.out.println(driver.getTitle());

What will this code do?