// same range different description
fs.addFeature(new SequenceFeature("", "desc", 10, 20, Float.NaN, null));
fs.addFeature(new SequenceFeature("", "", 15, 25, Float.NaN, null));
// same range different description
fs.addFeature(new SequenceFeature("", "desc", 10, 20, Float.NaN, null));
fs.addFeature(new SequenceFeature("", "", 15, 25, Float.NaN, null));