/**
  * Specify allowed comparison operators
  *
  * @return Enterprise_CustomerSegment_Model_Segment_Condition_Segment
  */
 public function loadOperatorOptions()
 {
     parent::loadOperatorOptions();
     $this->setOperatorOption(array('==' => Mage::helper('enterprise_customersegment')->__('matches'), '!=' => Mage::helper('enterprise_customersegment')->__('does not match'), '()' => Mage::helper('enterprise_customersegment')->__('is one of'), '!()' => Mage::helper('enterprise_customersegment')->__('is not one of')));
     return $this;
 }