SequenceableCollection.java

public class SequenceableCollection {

  public static <T> List<T> streamContents(Supplier<List<T>> constructor, Consumer<Consumer<T>> block) {
    List<T> result = constructor.get();
    block.accept(each -> result.add(each));
    return result;
  }

  public static List<String> example(ResultSet rs) {
    return streamContents(ArrayList::new, (accumulator) -> {
      try {
        while (rs.next()) {
          accumulator.accept(rs.getString(1));
        }
      } catch (SQLException e) {
        throw new RuntimeException("can't read result set", e);
      }
    });
  }

}

Why is there an SQLException reference in there?