Creates a new group within the timeline. The sequential set of items defined by the start and end indices will be included in the group. A group cannot contains another group so none of the items being grouped can be a group of this will fail.
"timelineGroups_var" is a variable referencing a TimelineGroups object. |
"timelineGroups_var" is a variable referencing a TimelineGroups object. |
| Type | Description |
| TimelineGroup | Returns the created TimelineGroup object or null in the case of failure. |
| Name | Type | Description |
| startIndex | integer | The index of the first item in the timeline that will be added to the group. |
| endIndex | integer | The index of the last item in the timeline that will be added to the group. |