TwoTuple_PublicKeyTypeZ ret_hu_conv = new TwoTuple_PublicKeyTypeZ(null, ret);
ret_hu_conv.ptrs_to.add(ret_hu_conv);
ret_hu_conv.ptrs_to.add(b);
TwoTuple_PublicKeyTypeZ ret_hu_conv = new TwoTuple_PublicKeyTypeZ(null, ret);
ret_hu_conv.ptrs_to.add(ret_hu_conv);
ret_hu_conv.ptrs_to.add(b);