@Override
  public Envelope expandEnvelope(Envelope env) {
    for (int i = 0; i < points.size(); i += dimension) {
      env.expandToInclude(points.get(i), points.get(i + 1));
    }
    return env;
  }
A mutable {@link CoordinateSequence} that grows to fit new elements when {@code set*} methods are called.
planetiler-core/src/main/java/com/onthegomap/planetiler/reader/parquet/CoordinateSequenceBuilder.java