in src/main/java/org/apache/skywalking/banyandb/v1/client/util/TimeUtils.java [42:50]
public static Timestamp fromEpochNanos(long nanos) {
long seconds = nanos / 1000_000_000;
int nanosInt = (int) (nanos - seconds * 1000_000_000);
int res = nanosInt % 1000_000;
return Timestamp.newBuilder()
.setSeconds(seconds)
.setNanos(nanosInt - res)
.build();
}