import java.util.Collection;import java.rmi.RemoteException;import javax.ejb.*;public interface ProductHome extends EJBHome {    public Product create(String productId, String description,         double balance) throws RemoteException, CreateException;        public Product findByPrimaryKey(String productId)         throws FinderException, RemoteException;        public Collection findByDescription(String description)        throws FinderException, RemoteException;    public Collection findInRange(double low, double high)        throws FinderException, RemoteException;}