When I use WebDriverWait rather than Thread.sleep I get a StaleElementReferenceException

Question

I am trying to write a Selenium object Builder for a Swagger page, in groovy. For the purposes of this discussion, my problem code can be reduced down to the following:

Answer 1

After the most excellent research / suggestion by @Louis, I ended up using:

def wait = new FluentWait(By.className("resource")).
        withTimeout(10, TimeUnit.SECONDS).
        ignoring(NoSuchElementException)
wait.until(new Function() {
            WebElement res
            Boolean apply(By by) {
                def oldRes = res
                res = driver.findElement(by)
                return res == oldRes
            }
        })

If anyone is interested, the entire Builder can be found on SourceForge (still under construction at the time of this writing).