protected function _prepareMassaction(){
$this->setMassactionIdField('entity_id');
$this->getMassactionBlock()->setFormFieldName('field_name');
$this->getMassactionBlock()->addItem('status', array( 'label'=> Mage::helper('namespace_module')->__('Save'),
'url' => $this->getUrl('*/*/massSave', array('_current'=>true)) ));
return $this;
}
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