instant

The timestamp value only, truncated to Instant's nanosecond resolution. For SecondsCapped this is whole-second; for Fractional it reflects the decoded fraction only up to nanoseconds.

This is lossy with respect to the encoding: the exact, arbitrary-precision fraction (which may exceed nanoseconds, or be all zeroes) lives in Fractional.fractionalSeconds, and whether a fraction is encoded at all is determined by the subtype. Never use instant or instant.nanosecondsOfSecond to decide whole-second vs fractional — see the class-level note.