code: public static OffsetGroupSpan create(final Symbol spanType, final OffsetGroupRange range,
        final Map<String, String> otherAttributes) {
      return new OffsetGroupSpan(spanType, range, otherAttributes);
    }
docs: /*private static final Symbol REGION_SPAN = Symbol.from("RegionSpan");
  
  public static OffsetGroupSpan createRegionSpan(final OffsetGroupRange range) {
  return new OffsetGroupSpan(REGION_SPAN, range, ImmutableMap.<String,String>of());
  }