public function hasAdapter($type = '')
    {
        $returnValue = (bool) false;

        
		$adapterClass = empty($type)?'tao_helpers_grid_Cell_Adapter':$type;
		foreach($this->adapters as $adapter){
			if($adapter instanceof $adapterClass){
				$returnValue = true;
				break;
			}
		}
		
        

        return (bool) $returnValue;
    }