@breif Get the end key of this container.
357 {
358 std::shared_lock<std::shared_mutex> lock(
m_Mutex);
359
360 if (
size() == 0)
return nullptr;
361
363 }
std::shared_mutex m_Mutex
Mutex for this container.
size_t size()
The container's element size.
std::list< K > m_Keys
The container keeps iter in order.