title: OneToMany wihout specifying of owner's class
body: <p>How I could join product with image as oneToMany
  wihout specifying of owner's class?
  To use 'image' for different owners' tables?</p>
  
  <pre><code>@Entity
  @Table(name = "product")
  public class Product extends BaseModel {//baseModel has 'id' column
  @Column
  private List&lt;Image&gt; images;
  }
  }
  
  @Entity
  @Table(name = "image")
  public class Image extends BaseModel {//baseModel has 'id' column
  @Column 
  private Object owner;
  }
  </code></pre>