def add_resourcegroupitems(scenario_id, items, scenario=None, **kwargs):

    """
        Get all the items in a group, in a scenario.
    """
    user_id = int(kwargs.get('user_id'))

    if scenario is None:
        scenario = _get_scenario(scenario_id, user_id)

    _check_network_ownership(scenario.network_id, user_id)

    newitems = []
    for group_item in items:
        group_item_i = _add_resourcegroupitem(group_item, scenario.id)
        newitems.append(group_item_i)

    db.DBSession.flush()

    return newitems
Get all the items in a group, in a scenario.