SeleniumWebDriverWait.java

private ExpectedCondition<Boolean> element(final By findCondition) {
    return new ExpectedCondition<Boolean>() {
        @Override
        public Boolean apply(WebDriver from) {
            RenderedWebElement element = (RenderedWebElement)
                driver.findElement(findCondition);
            return element.isDisplayed();
        }
    };
}

Wait<WebDriver> wait = new WebDriverWait(driver, 60);

wait.until(element(By.id("some_div")));