def METHOD_NAME(self):
    """Get network info from a particular snapshot.
       Returns:
           list: A list that contains nested lists of per-instance
               InstanceNetworksInterface objects.
    """
    model_manager = self.service_config.model_manager
    scoped_session, data_access = model_manager.get(self.model_name)
    instance_from_data_models = []
    with scoped_session as session:
        for instance_from_data_model in data_access.scanner_iter(
                session, 'instance'):
            instance_from_data_models.append(instance_from_data_model)
    network_interfaces = []
    for instance_from_data_model in instance_from_data_models:
        proj = project.Project(
            project_id=instance_from_data_model.parent.name,
            full_name=instance_from_data_model.parent.full_name)
        ins = instance.Instance.from_json(
            parent=proj,
            json_string=instance_from_data_model.data)
        network_interfaces.append(ins.create_network_interfaces())
    if not network_interfaces:
        LOGGER.warning('No VM network interfaces found.')
        return []
    return network_interfaces