/**
  * retrieve the default AcceptCreditCard
  *
  * @return object           The default AcceptCreditCard object on success,
  *                          null otherwise
  * @static
  * @access public
  */
 function &getDefault()
 {
     if ($GLOBALS['_CRM_CONTRIBUTE_BAO_ACCEPTCREDITCARD']['_defaultAcceptCreditCard'] == null) {
         $params = array('is_default' => 1);
         $defaults = array();
         $GLOBALS['_CRM_CONTRIBUTE_BAO_ACCEPTCREDITCARD']['_defaultAcceptCreditCard'] = CRM_Contribute_BAO_AcceptCreditCard::retrieve($params, $defaults);
     }
     return $GLOBALS['_CRM_CONTRIBUTE_BAO_ACCEPTCREDITCARD']['_defaultAcceptCreditCard'];
 }