| pos | const | Index ('IT' parameter: integer for Array, Key for Map) | 
| create | bool | Set to true if the element should be created if it does not exist. | 
| justAdded | bool * | Used to request information whether a previously non-existent element was added (with create = true). The bool variable passed must be initialized to false by the caller. | 
| Return Value | IteratorPointer | An iterator pointer to the element indexed, or null if not found and not created. |