Gets the #PanelWidget:save-delegate property.
The save delegate may be used to perform save operations on the content within the widget.
Document editors might use this to save the file to disk.
a #PanelSaveDelegate or null
Gets the #PanelWidget:save-delegate property.
The save delegate may be used to perform save operations on the content within the widget.
Document editors might use this to save the file to disk.