public IntRangeSet xor(int start, int end) {
    bitmap.xor(RoaringBitmap.bitmapOfRange(start, end + 1L));
    return this;
  }
Mutates and returns this range set, with each element from {@code a} to {@code b} (inclusive) added if missing, and
removed if present.
planetiler-core/src/main/java/com/onthegomap/planetiler/collection/IntRangeSet.java