ThisVariable.after.java

class ThisVariable {

    private ThisVariable getRoot() {
        ThisVariable result = this;
        while (true) {
            if (result.getParent() instanceof ThisVariable) {
                result = ((ThisVariable) result.getParent());
                continue;
            }
            return result;
        }
    }

  public Object getParent() {
    return null;
  }
}