Example of setting up and running gamma+gamma to dimuon tree
cmsrel CMSSW_13_2_6_patch2
cd CMSSW_13_2_6_patch2/src
cmsenv
git clone -b ParticleFitter_13_2_X https://github.com/davidlw/VertexCompositeAnalysis
cd VertexCompositeAnalysis
scram b -j8
cd VertexCompositeProducer/test
cmsRun PbPbSkimAndTree2023_Phi_ParticleAnalyzer_cfg.py