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.

def _parse_description(self, config):
        """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.
        """
        value = None
        match = re.search(r'description (.+)$', config, re.M)
        if match:
            value = match.group(1)
        return dict(description=value)