How do I mock a method with generic objects in JMockit

mockit.RealMethodNotFoundForMockException: Corresponding real methods not found for the following mocks:
Object save(Object)
    at mockit.internal.RedefinitionEngine.modifyRealClass(RedefinitionEngine.java:130)
    at mockit.internal.RedefinitionEngine.modifyRealClass(RedefinitionEngine.java:88)
    at mockit.internal.RedefinitionEngine.redefineMethods(RedefinitionEngine.java:72)
    at mockit.Mockit.setUpMocks(Mockit.java:197)
    at com.mytest.MyTest.setUp(AdminManagerImplTest.java:83)

public <T> void foo(T param) {
  ...
}

public <T> void foo(T param) {
  ...
}

public <T> void foo(T param) {
  ...
}

public void foo(Object param) {
  ...
}

public <T extends Map> foo(T param) {
  ...
}

public void foo(Map param) {
  ...
}

Mockit.redefineMethods(EntityManagerImpl.class, EntityManagerImplMock.class);

Mockit.redefineMethods(AbstractEntityManagerImpl.class, EntityManagerImplMock.class);

public static class EntityManagerImplMock {
    public <T> T merge(final T o) {
        // nothing
        return o;
    }
}