record type: document that -1 timestamp type is unknown.
@@ -41,9 +41,9 @@ type Record struct {
// The default, 0, means that the timestamp was determined in a client
// when the record was produced.
//
- // The alternative is 1, which is when the Timestamp is set in Kafka.
+ // An alternative is 1, which is when the Timestamp is set in Kafka.
//
- // Records pre 0.11.0.0 did not have timestamps.
+ // Records pre 0.10.0 did not have timestamps and have value -1.
TimestampType int8
// Topic is the topic that a record is written to.
