code: def show_errors(self):
          
          if self.configuration_warnings:
              logger.warning("Configuration warnings:")
              for msg in self.configuration_warnings:
                  logger.warning(msg)
          if self.configuration_errors:
              logger.warning("Configuration errors:")
              for msg in self.configuration_errors:
                  logger.warning(msg)
docs: Loop over configuration warnings and log them as INFO log
          Loop over configuration errors and log them as INFO log
  
          Note that the warnings and errors are logged on the fly during the configuration parsing.
          It is not necessary to log as WARNING and ERROR in this function which is used as a sum-up
          on the end of configuration parsing when an error has been detected.
  
          :return:  None