Method MergeAttr

core/lib/node.cpp:121–131

}

void Node::MergeAttr(Node* orig)
{
    auto ir = orig->dict_map_.begin();
    const auto end = orig->dict_map_.end();

    while(ir != end)
    {
        dict_map_[ir->first].swap(orig->dict_map_[ir->first]);
        ir++;
    }
}

/* code for attr get/set/add */