Fieldmanager_Field::get_element_key PHP Method

    public function get_element_key()
    {
        $el = $this;
        $key = $el->name;
        while ($el = $el->parent) {
            if ($el->add_to_prefix) {
                $key = "{$el->name}_{$key}";
            }
        }
        return $key;
    }