docs: final boolean isAnyChildMatched() {
      if (isAnyChildMatched == null) {
        isAnyChildMatched = false;
        for (RecursableDiffEntity entity : childEntities()) {
          if ((entity.isMatched() && !entity.isContentEmpty()) || entity.isAnyChildMatched()) {
            isAnyChildMatched = true;
            break;
          }
        }
      }
      return isAnyChildMatched;
    }