code: private boolean countClassAccess(final int classAtStackIndex) {
          String calledClass;
  
          try {
              if (stack.getStackDepth() > classAtStackIndex) {
                  OpcodeStack.Item itm = stack.getStackItem(classAtStackIndex);
                  JavaClass cls = itm.getJavaClass();
                  if (cls != null) {
                      calledClass = cls.getClassName();
                      countClassAccess(calledClass);
                      return true;
                  }
              }
          } catch (ClassNotFoundException cfne) {
              bugReporter.reportMissingClass(cfne);
          }
  
          return false;
      }
docs: increment the count of class access of the class on the stack
  
  @param classAtStackIndex
  the position on the stack of the class in question
  
  @return true if the class is counted