sf.setValue("Parent", "gene:" + geneId);
assertTrue(testee.retainFeature(sf, geneId));
sf.setValue("Parent", "gene:XYZ");
assertFalse(testee.retainFeature(sf, geneId));
sf.setValue("Parent", "gene:" + geneId);
assertTrue(testee.retainFeature(sf, geneId));
sf.setValue("Parent", "gene:XYZ");
assertFalse(testee.retainFeature(sf, geneId));