assertTrue(props.getExperimentReferences().contains(l1));
assertEquals(1,props.getExperimentReferences().size());
//Test2:
long l2 = 234;
props.addExperimentReference(l2);
assertTrue(props.getExperimentReferences().contains(l1));
assertTrue(props.getExperimentReferences().contains(l2));
assertEquals(2,props.getExperimentReferences().size());
//Test3: 1/4