static LongLongMap newInMemorySortedTable() {
    return from(Type.SORTED_TABLE, Storage.RAM, new Storage.Params(Path.of("."), false));
  }
Returns a new long map using {@link Type#SORTED_TABLE} and {@link Storage#RAM}.
planetiler-core/src/main/java/com/onthegomap/planetiler/collection/LongLongMap.java