/**
* 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::$_fieldKeys = array('id' => 'id', 'membership_id' => 'membership_id', 'status_id' => 'status_id', 'start_date' => 'start_date', 'end_date' => 'end_date', 'modified_id' => 'modified_id', 'modified_date' => 'modified_date', 'membership_type_id' => 'membership_type_id', 'max_related' => 'max_related');
}
return self::$_fieldKeys;
}
