如何覆盖Java中的类？

有一个图书馆https://github.com/thoughtbot/expandable-recycler-view

我想覆盖一个类

public class ExpandableGroup<T extends Parcelable> implements Parcelable {
  private String title;
  private List<T> items;

  public ExpandableGroup(String title, List<T> items) {
    this.title = title;
    this.items = items;
  }

  public String getTitle() {
    return title;
  }

  public List<T> getItems() {
    return items;
  }

  public int getItemCount() {
    return items == null ? 0 : items.size();
  }

  @Override
  public String toString() {
    return "ExpandableGroup{" +
        "title='" + title + '\'' +
        ", items=" + items +
        '}';
  }

  protected ExpandableGroup(Parcel in) {
    title = in.readString();
    byte hasItems = in.readByte();
    int size = in.readInt();
    if (hasItems == 0x01) {
      items = new ArrayList<T>(size);
      Class<?> type = (Class<?>) in.readSerializable();
      in.readList(items, type.getClassLoader());
    } else {
      items = null;
    }
  }

  @Override
  public int describeContents() {
    return 0;
  }

  @Override
  public void writeToParcel(Parcel dest, int flags) {
    dest.writeString(title);
    if (items == null) {
      dest.writeByte((byte) (0x00));
      dest.writeInt(0);
    } else {
      dest.writeByte((byte) (0x01));
      dest.writeInt(items.size());
      final Class<?> objectsType = items.get(0).getClass();
      dest.writeSerializable(objectsType);
      dest.writeList(items);
    }
  }

  @SuppressWarnings("unused")
  public static final Creator<ExpandableGroup> CREATOR =
      new Creator<ExpandableGroup>() {
        @Override
        public ExpandableGroup createFromParcel(Parcel in) {
          return new ExpandableGroup(in);
        }

        @Override
        public ExpandableGroup[] newArray(int size) {
          return new ExpandableGroup[size];
        }
      };
}

这样您就可以使构造函数为空。和变量

String title, List<T> items通过设置器添加。

我的问题是List<T>.

我如何重写此类以使构造函数变为空？而且写入数据不方便

不能覆盖。怎样成为？