nlohmann::ordered_map::ordered_map

ordered_map() noexcept(noexcept(Container()));

explicit
ordered_map(Allocator const& alloc) noexcept(noexcept(Container(alloc)));

ordered_map(
    std::initializer_list<value_type> init,
    Allocator const& alloc = Allocator());

template<class It>
ordered_map(
    It first,
    It last,
    Allocator const& alloc = Allocator());