/**
* 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::$_fieldKeys = array('id' => 'id', 'entity' => 'entity', 'entity_value' => 'entity_value', 'entity_value_label' => 'entity_value_label', 'entity_status' => 'entity_status', 'entity_status_label' => 'entity_status_label', 'entity_date_start' => 'entity_date_start', 'entity_date_end' => 'entity_date_end', 'entity_recipient' => 'entity_recipient');
}
return self::$_fieldKeys;
}
