# Editor.AdvancedDropdownWidget.AdvancedDropdownPanel.SourceItem

```csharp
AdvancedDropdownItem SourceItem { get; set; }
```

The item whose children this panel displays. Null for root panel.

Declared in [Editor.AdvancedDropdownWidget.AdvancedDropdownPanel](/api/Editor.AdvancedDropdownWidget.AdvancedDropdownPanel).
Assembly: `Sandbox.Tools`.