为什么moveToElement方法没有在Selenium中的拖放位置释放对象？

Actions actions = new Actions(driver);
WebElement sourceElement = driver.findElement(By.id("sourceElement"));
WebElement targetElement = driver.findElement(By.id("targetElement"));
actions.dragAndDrop(sourceElement, targetElement).perform();

Actions actions = new Actions(driver);
WebElement sourceElement = driver.findElement(By.id("sourceElement"));
int xOffset = 100; // X轴偏移量
int yOffset = 100; // Y轴偏移量
actions.dragAndDropBy(sourceElement, xOffset, yOffset).perform();