iaField::filterByGroup PHP Method

    public function filterByGroup(&$items, $item = false, $params = array())
    {
        foreach (array('page', 'where', 'not_empty') as $key) {
            isset($params[$key]) || ($params[$key] = false);
        }
        $sections = $this->_getFieldgroups($params['page'], $item, $params['where'], $items, $params);
        if ($params['not_empty']) {
            if ($sections) {
                foreach ($sections as $section) {
                    if (isset($section['fields']) && $section['fields'] && is_array($section['fields'])) {
                        foreach ($section['fields'] as $field) {
                            if (isset($items[$field['name']]) && $items[$field['name']]) {
                                return $sections;
                            }
                        }
                    }
                }
            }
            return false;
        }
        return $sections;
    }