Item structure provided to a TreeView using the default implementation. For more information on usage, refer to TreeView and Create list and tree views.
| children | Children of this tree item. |
| data | Data for this item. |
| hasChildren | Whether this item has children or not. |
| id | Id of the item. |
| TreeViewItemData_1 | Creates a TreeViewItemData_1 with all required parameters. |