Method AbstractStateLibrary

src/CoolPropLib.cpp:486–486

   public:
    AbstractStateLibrary() = default;
    long add(const shared_ptr<CoolProp::AbstractState>& AS) {
        std::scoped_lock guard(ASLib_mutex);
        ASlibrary.insert(std::pair<std::size_t, shared_ptr<CoolProp::AbstractState>>(this->next_handle, AS));