code: def get_parent_log_nodes(self):
          
          parent_log_nodes = []
          for node in self._my_map['parentNodes']:
              parent_log_nodes.append(LogNode(
                  node._my_map,
                  runtime=self._runtime,
                  proxy=self._proxy,
                  lookup_session=self._lookup_session))
          return LogNodeList(parent_log_nodes)
docs: Gets the parents of this log.
  
          return: (osid.logging.LogNodeList) - the parents of this log
          *compliance: mandatory -- This method must be implemented.*