public SortKey thenByTruesFirst(boolean value) {
    return thenByInt(value ? 0 : 1, 0, 1);
  }
Adds a field to this sort key where if all previous values are equal, then elements where {@code value == true}
sort before elements where {@code value == false}.
planetiler-core/src/main/java/com/onthegomap/planetiler/util/SortKey.java