Writes the given values for the respective resources in the list, all writes have same
        timestamp.

        Args:
            auth: cik for authentication.
            entries: List of key, value lists. eg. [[key, value], [k,v],,,]

def writegroup(self, auth, entries, defer=False):
        """ Writes the given values for the respective resources in the list, all writes have same
        timestamp.

        Args:
            auth: cik for authentication.
            entries: List of key, value lists. eg. [[key, value], [k,v],,,]
        """
        return self._call('writegroup', auth, [entries], defer)