code: private static boolean isOnStack(int moreThan, String canonicalName) {
          StackTraceElement[] stackTrace = Thread.currentThread().getStackTrace();
          int count = 0;
          for (StackTraceElement element : stackTrace) {
              if (element.getClassName().startsWith(canonicalName)) {
                  count++;
              }
          }
          return count > moreThan;
      }
docs: Checks if the given name is on stack more than the given number of times.
  This method uses startsWith to check if the given name is on stack, so
  one can pass a package name too.
  
  Intentionally duplicate.