code: def close_file(self):
          
  
          if not self.is_modified():
              LOGGER.debug("> Closing '{0}' file.".format(self.__file))
  
              self.file_closed.emit()
              return True
  
          choice = message_box.message_box("Warning", "Warning",
                                           "'{0}' document has been modified!\nWould you like to save your changes?".format(
                                               self.get_file_short_name()),
                                           buttons=QMessageBox.Save | QMessageBox.Discard | QMessageBox.Cancel)
          if choice == QMessageBox.Save:
              if self.save_file():
                  LOGGER.debug("> Closing '{0}' file.".format(self.__file))
                  return True
          elif choice == QMessageBox.Discard:
              LOGGER.debug("> Discarding '{0}' file.".format(self.__file))
  
              self.file_closed.emit()
              return True
          else:
              return False
docs: Closes the editor file.
  
          :return: Method success.
          :rtype: bool