Return the version of the community.

        :returns: hash which encodes the community id and its las update.
        :rtype: str

def version_id(self):
        """Return the version of the community.

        :returns: hash which encodes the community id and its las update.
        :rtype: str
        """
        return hashlib.sha1('{0}__{1}'.format(
            self.id, self.updated).encode('utf-8')).hexdigest()