FPTracker::QuadFocuserVertical Node1 FPTracker::QuadFocuserVertical - m_xe - m_xae - m_ye - m_yae + focus() + xe() + xae() + ye() + yae() + label() Node2 FPTracker::IQuadFocuser + focus() + ~IQuadFocuser() + xe() + xae() + ye() + yae() + label() Node2->Node1 Node3 std::string Node3->Node1 -s_label Node4 std::basic_string< char > Node4->Node3