Interface for classes implementing UI panels.
| Property | Description | 
|---|---|
| contextType | Describes in which context a VisualElement hierarchy is being run. | 
| contextualMenuManager | The Contextual menu manager for the panel. | 
| dispatcher | This Panel EventDispatcher. | 
| focusController | Return the focus controller for this panel. | 
| isDirty | Checks whether any element within the panel has had any changes to its state since the panel was last rendered. | 
| scaledPixelsPerPoint | Gives the current scaled pixels per point value of the panel. | 
| visualTree | Root of the VisualElement hierarchy. |