SG::ArenaPoolSTLAllocator_initParams< T > Node1 SG::ArenaPoolSTLAllocator _initParams< T > + ArenaPoolSTLAllocator _initParams() + params() + operator ArenaAllocatorBase ::Params() Node2 SG::ArenaAllocatorBase ::initParams< T, false, true, true > - m_nblock - m_name + initParams() + params() + operator Params() Node2->Node1