gistfile1.java

package my;
public interface IModel {}


package my;
public interface IWriter
{
    public IWriter add( ?????????? target);
}


package my.other;
public class Model implements my.IModel {}


package my.second;
public class Model implements my.IModel {}
// etc.. etc.. etc.. etc.. etc.. etc..


package my;
public class Writer implements IWriter
{
    public IWriter add(my.other.Model target)
    {
        return null;
    }
    
    public IWriter add(my.second.Model target)
    {
        return null;
    }

    // etc.. etc.. etc.. etc.. etc.. etc..
}