Article.java

public class Article {
    public String id;
    public String title;
    public Image cell_image;
    public Video video;
    public User author;
    public String subtitle;
    public List<Content> content;
    public int like_count;
    public List<Comment> comments;
    public Date published_at;
    
    public Article() {
    }
    // ... more code - e.g. Constructors ...
}