code: func (obj *Doc) DoSave(ctx context.Context, fileName string) error {
  	err := obj.rpc(ctx, "DoSave", nil, fileName)
  	return err 
  }
docs: // Saves an app. All objects and data in the data model are saved.
  //
  // Parameters:
  //
  // ◾ fileName   -   Name of the file to save.
  //