| Parameter | Description |
|---|---|
| id | The item ID. |
| collapseAllChildren | Whether the whole hierarchy under that item will be collapsed. |
| refresh | Whether to refresh items or not. Set to false when doing multiple operations on the tree, to only do one RefreshItems once all operations are done. |
Collapses the item with the specified ID, hiding its children. Allows to collapse the whole hierarchy under that item.