@Test
public void checkNullableEntitiesAndRemapTest() {

    Response response = RESTUtils.checkNullableEntitiesAndRemap(1l, null, (a, b) -> "");
    assertEquals(404, response.getStatus());
    response = RESTUtils.checkNullableEntitiesAndRemap(null, "", (a, b) -> "");
    assertEquals(404, response.getStatus());
    response = RESTUtils.checkNullableEntitiesAndRemap("", "", (a, b) -> "ENTITY");
    assertEquals(200, response.getStatus());
    assertEquals("ENTITY", response.getEntity());
}