filter.setAlignmentIndices(Collections.EMPTY_SET);
assertFalse(filter.allows(one));
assertFalse(filter.allows(two));
// make self-contradictory filter
filter = new AlignedEdgeFilter(indices, MatchType.SOURCE_ALIGNED, MatchType.SOURCE_UNALIGNED);
assertFalse(filter.allows(one));
assertFalse(filter.allows(two));
}