code: public static void exitFrame(String className) {
          int counter = local.get().decrementAndGet();
          if (counter < 0) {
              String errorMessage = "Method frame counter is less then 0. Some programming error: count(exitFrame) > count(enterFrame)."
                      + getClassNames();
              clearCounter();
              throw new RuntimeException(errorMessage);
          }
          String frameToExit = classNames.get().remove(classNames.get().size() - 1);
          if (!className.equals(frameToExit)) {
              throw new RuntimeException("Method frame counter try to exit from the class '" + className
                      + "' but must exit from the class '" + frameToExit + "' first." + getClassNames());
          }
      }
docs: Decrement the counter and remove class name from the list.
  @param className name of class to exit from.