Не работает Custom element - ZOO для разработчиков

<?php
// no direct access
defined('_JEXEC') or die('Restricted access');
// register ElementRepeatable class
App::getInstance('zoo')->loader->register('ElementRepeatable', 'elements:repeatable/repeatable.php');
class ElementPrice extends ElementRepeatable implements iRepeatSubmittable {
     
    protected function _hasValue($params = array()) {
        $value = $this->get('value');
        return $this->_containsEmail($value);
    }
    public function getText() {
        $text = $this->get('value', '');
        return empty($text)? $this->get('value', '') : $text;
    }
     
    protected function _edit(){
        return $this->_editForm();
    }
    public function _renderSubmission($params = array()) {
        return $this->_editForm($params->get('trusted_mode'));
    }
    protected function _editForm($trusted_mode = true) {
        if ($layout = $this->getLayout('edit.php')) {
            return $this->renderLayout($layout,
                array('trusted_mode' => $trusted_mode
                )
            );
        }
    }
    public function _validateSubmission($value, $params) {
        $values    = $value;
        $validator = $this->app->validator->create('string', array('required' => false));
        $value      = $validator->clean($values->get('value'));
        $country   = $validator->clean($values->get('country'));
        $state      = $validator->clean($values->get('state'));
        return compact( 'value', 'country', 'state');
    }
}

<?php
// no direct access
defined('_JEXEC') or die('Restricted access');
?>
<div>
    <?php echo $this->app->html->_('control.text', $this->getControlName('value'), $this->get('value'), 'size="60" title="'.JText::_('value').'" placeholder="'.JText::_('Size').'"'); ?>       
             
    <?php echo $this->app->html->_('control.text', $this->getControlName('country'), $this->get('country'), 'size="60" title="'.JText::_('country').'" placeholder="'.JText::_('Comment').'"'); ?>
             
    <?php echo $this->app->html->_('control.text', $this->getControlName('state'), $this->get('state'), 'size="60" title="'.JText::_('state').'" placeholder="'.JText::_('Price').'"'); ?>
         
</div>