Cherry pick 55883

Cherry pick 55883

MuonSpectrometer/MuonValidation/MuonTesterTree/MuonTesterTree/MuonTesterBranch.h

@@ -30,6 +30,8 @@ public:
     bool initialized() const;
     /// Returns the underlying TTree object
     const TTree* tree() const;
+    TTree* tree();
+ 
     /// Returns the data dependencies needed by the MuonTesterBranch
     std::vector<DataDependency> data_dependencies() override final;
 

MuonSpectrometer/MuonValidation/MuonTesterTree/Root/MuonTesterBranch.cxx

@@ -47,6 +47,7 @@ MuonTesterBranch::MuonTesterBranch(TTree* tree, const std::string& br_name) : m_
 std::string MuonTesterBranch::name() const { return m_name; }
 bool MuonTesterBranch::initialized() const { return m_init; }
 const TTree* MuonTesterBranch::tree() const { return m_tree; }
+TTree* MuonTesterBranch::tree() { return m_tree; }
 
 std::string MuonTesterBranch::eraseWhiteSpaces(const std::string& In) {
     std::string out = In;