docs: def close_first_file(self):
          """
          Attemtps to close the first **Script_Editor_tabWidget** Widget tab Model editor file.
  
          :return: Method success.
          :rtype: bool
          """
  
          editor = self.get_current_editor()
          if len(self.__model.list_editors()) == 1 and editor.is_untitled and not editor.is_modified():
              self.close_file(leave_first_editor=False)
              return True