public static function isValid(&$properties_dictionary, $limit_to_keys, &$error)
 {
     //	Check each property is valid
     //
     if (!parent::isValid($properties_dictionary, $limit_to_keys, $error)) {
         return false;
     }
     if (ValidationC::should_test_property(EVENT_TYPE_PARTY_LAUNCH_KEY_LAUNCH_ITEM_TITLE, $properties_dictionary, true, $limit_to_keys) && !EventTypePartyLaunch::propertyIsValid(EVENT_TYPE_PARTY_LAUNCH_KEY_LAUNCH_ITEM_TITLE, $properties_dictionary[EVENT_TYPE_PARTY_LAUNCH_KEY_LAUNCH_ITEM_TITLE], $error)) {
         //	Launch item title was not valid
         //
         return false;
     }
     return true;
 }