@Test
public void addSourceMap() {

    Map<String, String> retrieved = kiePMMLFactoryModel.getSourcesMap();
    assertTrue(retrieved.isEmpty());
    kiePMMLFactoryModel.addSourceMap("KEY", "VALUE");
    retrieved = kiePMMLFactoryModel.getSourcesMap();
    assertTrue(retrieved.containsKey("KEY"));
    assertEquals("VALUE", retrieved.get("KEY"));
}