Normal waits conditions to be used with Page Object Model

GeneralWaitsWithPOM

    public boolean isElementDisplayed(WebElement element) {
        try {
            return element.isDisplayed();
        } catch (NoSuchElementException | TimeoutException | StaleElementReferenceException ex) {
            return false;
        }
    }

    public boolean areElementsDisplayed(List<WebElement> elements) {
        return elements.size() > 0
                && elements.stream().allMatch(webElement -> isElementDisplayed(webElement));
    }

    public Page waitUntilElementIsDisplayed(WebElement element) {

        FluentWait<WebElement> wait = new FluentWait<>(element);
        wait.withTimeout(30, TimeUnit.SECONDS);
        wait.until(webElement -> isElementDisplayed(webElement));
        return this;
    }

    public Page waitUntilElementsAreDisplayed(List<WebElement> elements) {
        FluentWait<List<WebElement>> wait = new FluentWait<>(elements);
        wait.withTimeout(30, TimeUnit.SECONDS);
        wait.until(webElements -> areElementsDisplayed(webElements));
        return this;
    }

    public boolean isElementClickable(final WebElement element) {
        return isElementDisplayed(element) && element.isEnabled();
    }

    public Page waitUntilElementIsClickable(WebElement element) {

        FluentWait<WebElement> wait = new FluentWait<>(element);
        wait.withTimeout(30, TimeUnit.SECONDS);
        wait.until(webElement -> isElementClickable(webElement));
        return this;
    }

    public boolean isElementNotDisplayed(WebElement element) {
        try {
            return !element.isDisplayed();
        } catch (NoSuchElementException | TimeoutException | StaleElementReferenceException ex) {
             // Assuming a stale element isn't displayed.
            return true;
        }
    }

    public Page waitUntilElementIsNotDisplayed(WebElement element) {

        FluentWait<WebElement> wait = new FluentWait<>(element);
        wait.withTimeout(30, TimeUnit.SECONDS);
        wait.until(webElement -> isElementNotDisplayed(webElement));
        return this;
    }

    public boolean areElementsNotDisplayed(List<WebElement> elements) {
        return elements.stream().allMatch(ele -> isElementNotDisplayed(ele));
    }

    public Page waitUntilElementsAreNotDisplayed(List<WebElement> elements) {
        FluentWait<List<WebElement>> wait = new FluentWait<>(elements);
        wait.withTimeout(30, TimeUnit.SECONDS);
        wait.until(webElements -> areElementsNotDisplayed(webElements));
        return this;
    }