/**
  * returns the list of fields that can be exported
  *
  * @access public
  * return array
  */
 function &export($prefix = false)
 {
     if (!$GLOBALS['_CRM_CORE_DAO_IMPROVIDER']['_export']) {
         $GLOBALS['_CRM_CORE_DAO_IMPROVIDER']['_export'] = array();
         $fields =& CRM_Core_DAO_IMProvider::fields();
         foreach ($fields as $name => $field) {
             if (CRM_Utils_Array::value('export', $field)) {
                 if ($prefix) {
                     $GLOBALS['_CRM_CORE_DAO_IMPROVIDER']['_export']['im_provider'] =& $fields[$name];
                 } else {
                     $GLOBALS['_CRM_CORE_DAO_IMPROVIDER']['_export'][$name] =& $fields[$name];
                 }
             }
         }
     }
     return $GLOBALS['_CRM_CORE_DAO_IMPROVIDER']['_export'];
 }
 /**
  * class constructor
  */
 function CRM_Core_BAO_IMProvider()
 {
     parent::CRM_Core_DAO_IMProvider();
 }