protected function _filterStoreCondition($collection, $column)
    {
        if (!$value = $column->getFilter()->getValue()) {
            return;
        }
        $this->getCollection()->addStoreFilter($value);
    }
protected function _filterStoreCondition($collection, $column)
    {
        if (!$value = $column->getFilter()->getValue()) {
            return;
        }
        $this->getCollection()->addStoreFilter($value);
    }
protected function _filterStoreCondition ( $ collection , $ column ) { if ( ! $ value = $ column -> getFilter ( ) -> getValue ( ) ) { return ; } $ this -> getCollection ( ) -> addStoreFilter ( $ value ) ; }
Helper function to add store filter condition

@param Mage_Core_Model_Mysql4_Collection_Abstract $collection Data collection
@param Mage_Adminhtml_Block_Widget_Grid_Column    $column     Column information to be filtered

@return void
Helper function to add store filter condition