|  | 53 | ExRootAnalysis provides a set of classes simplifying access to the root ROOT trees. The most interesting class is ExRootTreeReader. This class provides simple methods sufficient to access every branch | 
          
            |  | 54 | in every event stored in a ROOT tree: | 
          
            |  | 55 | * ExRootTreeReader(TTree*) – constructor takes ROOT tree as parameter | 
          
            |  | 56 | * Long64_t GetEntries() – returns total number of events stored on the tree | 
          
            |  | 57 | * TClonesArray *UseBranch(branchName) – returns pointer to collection of branch | 
          
            |  | 58 | elements and specifies branches needed for analysis |