Wait until element disappears in Selenium

Below code waits until element disappears in Selenium.

public void waitUntilElementDisappear(By by){
        for (int i=0;i<=60;i++)
        {
            if (checkElementExists(by))
                sleep(1000)
            else
                break;
        }
    }

public boolean checkElementExists(By by, int seconds){
        boolean result=false;
        try {
            driver.manage().timeouts().
implicitlyWait(seconds, TimeUnit.SECONDS);
            driver.findElement(by);
            result = true;
        }catch (org.openqa.selenium.NoSuchElementException ex){
            result = false;
        }
        finally {
            driver.manage().timeouts().
implicitlyWait(20, TimeUnit.SECONDS);
}
        return  result;
    }

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