private static void HandleZone(PatternCursor pattern,
                                SteppedPatternBuilder <ZonedDateTime, ZonedDateTimeParseBucket> builder)
 {
     builder.AddField(PatternFields.Zone, pattern.Current);
     builder.AddParseAction(ParseZone);
     builder.AddFormatAction((value, sb) => sb.Append(value.Zone.Id));
 }
        private static void HandleOffset(PatternCursor pattern,
                                         SteppedPatternBuilder <OffsetDateTime, OffsetDateTimeParseBucket> builder)
        {
            builder.AddField(PatternFields.EmbeddedOffset, pattern.Current);
            string embeddedPattern = pattern.GetEmbeddedPattern('<', '>');
            var    offsetPattern   = OffsetPattern.Create(embeddedPattern, builder.FormatInfo).UnderlyingPattern;

            builder.AddParseAction((value, bucket) =>
            {
                var result = offsetPattern.ParsePartial(value);
                if (!result.Success)
                {
                    return(result.ConvertError <OffsetDateTime>());
                }
                bucket.Offset = result.Value;
                return(null);
            });
            builder.AddFormatAction((value, sb) => offsetPattern.AppendFormat(value.Offset, sb));
        }