code: public SDVariable[] updateVariableNamesAndReferences(SDVariable[] variablesToUpdate, String[] newVariableNames) {
  
          int numVariables = variablesToUpdate.length;
          SDVariable[] updatedVariables = new SDVariable[numVariables];
  
          for (int i = 0; i < numVariables; i++) {
              SDVariable varToUpdate = variablesToUpdate[i];
              String name = newVariableNames == null ? null : newVariableNames[i];
              updatedVariables[i] = updateVariableNameAndReference(varToUpdate, name);
          }
  
          return updatedVariables;
      }
docs: Updates the variable name property on the passed in variables, its reference in samediff, and returns the variable.
  
  @param variablesToUpdate the variable to update
  @param newVariableNames  the new variable name
  @return the updated, passed in variables