code: def _parse_trunk_groups(self, config):
          
          values = re.findall(r'switchport trunk group ([^\s]+)', config, re.M)
          return dict(trunk_groups=values)
docs: Scans the specified config and parses the trunk group values
  
          Args:
              config (str): The interface configuraiton blcok
  
          Returns:
              A dict object with the trunk group values that can be merged
                  into the resource dict