| Parameter | Description |
|---|---|
| view | The HierarchyView that fired the event. |
| item | The HierarchyViewItem for which the tooltip is being requested. |
| tooltip | A Text.StringBuilder object to which the tooltip text should be appended. |
| filtering | Whether the hierarchy is currently filtered. |
Delegate type used to handle the event of getting a tooltip for a HierarchyViewItem.