Method replaceOrPut

pdal/ArtifactManager.hpp:73–78

    template<typename T>
    bool replaceOrPut(const std::string& name, std::shared_ptr<T> art)
    {
        if (!replace(name, art))
            return put(name, art);
        return true;
    }

    bool erase(const std::string& name)
    {