If you call instant.getNano(), you must also call instant.getEpochSecond() in ‘nearby’ code. If you are trying to convert this instant to nanoseconds, you probably meant to use Instants.toEpochNanos(instant) instead.
Suppress false positives by adding the suppression annotation @SuppressWarnings("JavaInstantGetSecondsGetNano")
to the enclosing element.