code: def writegroup(self, auth, entries, defer=False):
          
          return self._call('writegroup', auth, [entries], defer)
docs: 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],,,]