PixelMapping Node1 PixelMapping   + PixelMapping() + mapping() + getID() + contains() + nModules() Node2 std::unordered_map < std::string, Coordinates >     Node2->Node1 -m_internalMap Node3 std::string     Node3->Node2 +keys Node4 std::basic_string< Char >     Node4->Node3 Node5 std::array< int, 5 > + elements + elements   Node5->Node2 +elements