ToolbarWidget constructor
      const
      ToolbarWidget({ 
    
    
- Key? key,
- required HtmlEditorController controller,
- required HtmlToolbarOptions htmlToolbarOptions,
- required Callbacks? callbacks,
Implementation
const ToolbarWidget({
  Key? key,
  required this.controller,
  required this.htmlToolbarOptions,
  required this.callbacks,
}) : super(key: key);