NanosecondTime not exposed

[degloff]

NanosecondTime is not exposed.

 Instant.epochTime(NanosecondTime(nanosecAsInt))

Is more descriptive than

Instant.fromEpochBigIntNanoseconds(BigInt.from(nanosecAsInt))

We can still keep current time in long 64 bit as for the next appox 260 years. After that I don't care anymore :)

[degloff]

May I also suggest to change the naming

factory Instant.fromEpochNanoseconds(int nanoseconds) => Instant.epochTime(ITime.trusted(0, nanoseconds));

Here fromEpochNanoseconds may be misleading, what about fromEpochNanosecondsInterval?