@Override
    public boolean equals(final Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        final To to = (To) o;
        return timestamp == to.timestamp &&
            Objects.equals(childName, to.childName);
    }
Set the timestamp of the output record.
@param timestamp the output record timestamp
@return itself (i.e., {@code this})
streams/src/main/java/org/apache/kafka/streams/processor/To.java