Method getOptions

/**
 * Method to get the options to populate to populate list
 *
 * @return  array  The field option objects.
 *
 * @since   3.2
 */
protected function getOptions()
{
    // Accepted modifiers
    $hash = md5($this->element->asXML());
    if (!isset(static::$options[$hash])) {
        static::$options[$hash] = parent::getOptions();
        $options = array();
        $limits = $this->defaultLimits;
        // Limits manually specified
        if (isset($this->element['limits'])) {
            $limits = explode(',', $this->element['limits']);
        }
        // User wants to add custom limits
        if (isset($this->element['append'])) {
            $limits = array_unique(array_merge($limits, explode(',', $this->element['append'])));
        }
        // User wants to remove some default limits
        if (isset($this->element['remove'])) {
            $limits = array_diff($limits, explode(',', $this->element['remove']));
        }
        // Order the options
        asort($limits);
        // Add an option to show all?
        $showAll = isset($this->element['showall']) ? (string) $this->element['showall'] === 'true' : true;
        if ($showAll) {
            $limits[] = 0;
        }
        if (!empty($limits)) {
            foreach ($limits as $value) {
                $options[] = (object) array('value' => $value, 'text' => $value != 0 ? Text::_('J' . $value) : Text::_('JALL'));
            }
            static::$options[$hash] = array_merge(static::$options[$hash], $options);
        }
    }
    return static::$options[$hash];
}