bool ICommandHandler <DisableEditorPreviewCommandArgs> .ExecuteCommand(DisableEditorPreviewCommandArgs args, CommandExecutionContext executionContext)
 {
     DefaultSourceEditorOptions.Instance.EnableNewEditor = false;
     return(true);
 }
 CommandState ICommandHandler <DisableEditorPreviewCommandArgs> .GetCommandState(DisableEditorPreviewCommandArgs args)
 => CommandState.Available;