/**
* Returns an array containing, for each field, the arary key used for that
* field in self::$_fields.
*
* @return array
*/
static function &fieldKeys()
{
if (!self::$_fieldKeys) {
self::$_fieldKeys = array('id' => 'id', 'job_id' => 'job_id', 'recipient_email' => 'recipient_email', 'headers' => 'headers', 'body' => 'body', 'added_at' => 'added_at', 'removed_at' => 'removed_at');
}
return self::$_fieldKeys;
}
