public VectorTile getVectorTile() {
      return getVectorTile(null);
    }
Returns true if {@code other} contains features with identical layer, geometry, and attributes, as this tile -
even if the tiles have separate coordinates.
<p>
Used as an optimization to avoid re-encoding the same ocean tiles over and over again.
planetiler-core/src/main/java/com/onthegomap/planetiler/collection/FeatureGroup.java