const ret_hu_conv: NetworkGraph = new NetworkGraph(null, ret);
CommonBase.add_ref_from(ret_hu_conv, ret_hu_conv);
CommonBase.add_ref_from(ret_hu_conv, logger);
const ret_hu_conv: NetworkGraph = new NetworkGraph(null, ret);
CommonBase.add_ref_from(ret_hu_conv, ret_hu_conv);
CommonBase.add_ref_from(ret_hu_conv, logger);