public function setViewLevel( $view_level_name, $view_level_file_name )
    {
        if ( isset($this->_view_levels[$view_level_name]) )
        {
            $this->_view_levels[$view_level_name]["file_name"] = $view_level_file_name;
            $this->_view_levels[$view_level_name]["is_disabled"] = false;
        }
    }