Method validateSection

/**
 * Returns a valid section for articles. If it is not valid then null
 * is returned.
 *
 * @param   string  $section  The section to get the mapping for
 * @param   object  $item     The item
 *
 * @return  string|null  The new section
 *
 * @since   4.0.0
 */
public function validateSection($section, $item = null)
{
    $helper = $this->loadHelper();
    if (!$helper || !\is_callable(array($helper, 'validateSection'))) {
        return $section;
    }
    return $helper::validateSection($section, $item);
}