function __construct($context = FALSE)
 {
     if ($context) {
         parent::__construct(__EXTOBJ_NO_INIT__, $context);
     } else {
         parent::__construct(__EXTOBJ_NO_INIT__);
     }
 }
 function __construct($template, $params = array(), $engine = 'php', $context = FALSE)
 {
     $this->_template = $template;
     $this->_params = (array) $params;
     $this->_engine = $engine;
     parent::__construct();
 }