/**
  * Enable or disable the Debug.  If $enable is false, the Debug
  * is disabled.
  *
  * @param  boolean $enable
  * @return Zend_Db_Profiler Provides a fluent interface
  */
 public static function setEnabled($enable)
 {
     self::$enabled = (bool) $enable;
     if (self::$enabled && (!self::$timer or !self::$vars)) {
         require_once 'Zend/Wildfire/Plugin/FirePhp/TableMessage.php';
         self::$timer = new Zend_Wildfire_Plugin_FirePhp_TableMessage('Timer');
         self::$timer->setBuffered(true);
         self::$timer->setHeader(array('Time (sec)', 'Total (sec)', 'Memory (Kb)', 'Total (Kb)', 'Comment', 'File'));
         self::$timer->setOption('includeLineNumbers', false);
     }
 }