Hi I am using Page Factory to keep all my locator in a class .
@FindBy(xpath="//select[@ng-model='selectedLeadSource']")
    WebElement source_of_lead;
    public Select getSourceOptions() {
        return new Select(source_of_lead);
    }
But I am not able to use wait as its throwing me an error.
wait.until(ExpectedConditions.elementToBeClickable(onPage.getSourceOptions().selectByValue("Campaign")));
Error :
The method elementToBeClickable(By) in the type ExpectedConditions is not applicable for the arguments (void)