Pythia8::mHatReweight Node1 Pythia8::mHatReweight + mHatReweight() + canModifySigma() + multiplySigmaBy() Node2 UserHooks Node2->Node1 Node3 Pythia8_UserHooks:: UserSetting< double > # m_param # m_settingsPtr # m_retrieved + UserSetting() + operator()() - uncachedRetrieve() - uncachedRetrieve() - uncachedRetrieve() - uncachedRetrieve() - uncachedRetrieve() Node3->Node1 -m_p1 -m_p2 -m_mHatConstMin -m_slope Node4 std::string Node4->Node3 #m_paramName Node5 std::basic_string< char > Node5->Node4