Prompts:
"""
In the last commit, `LocalDate.createOrNull` was introduced,
along with a usage sample, and with the existing tests modified
to also check `createOrNull`.
You should introduce `LocalTime.createOrNull` in the same way.
***
Now, similarly, introduce `LocalDateTime.createOrNull`
with tests and a usage sample.
***
Now also introduce `UtcOffset.createOrNull`
(with tests and a usage sample), except that since the constructor
for `UtcOffset` is internal, use the behavior from `fun UtcOffset`.
"""