docs: def close_all_files(self, leave_first_editor=True):
          """
          Closes every opened files and removes their associated **Script_Editor_tabWidget** Widget tabs.
  
          :return: Method success.
          :rtype: bool
          """
  
          # self.__engine.start_processing("Closing All Files ...", len(self.list_editors()))
          success = True
          for file in self.list_files():
              success *= True if self.close_file(file, leave_first_editor) else False
              if not success:
                  break
  
                  # self.__engine.step_processing()
          # self.__engine.stop_processing()
          return success