code: def _parse_description(self, config):
          
          value = None
          match = re.search(r'description (.+)$', config, re.M)
          if match:
              value = match.group(1)
          return dict(description=value)
docs: Scans the specified config block and returns the description value
  
          Args:
              config (str): The interface config block to scan
  
          Returns:
              dict: Returns a dict object with the description value retrieved
                  from the config block.  If the description value is not
                  configured, None is returned as the value.  The returned dict
                  is intended to be merged into the interface resource dict.