String isoTime(Int secs, [IsoTimeOpts] opts=[])
Arguments
secs: The Unix timestamp (seconds since 1970-01-01 00:00:00).opts: A list of IsoTimeOpts options. This argument may be omitted and defaults to the empty list.
Usage
Return an ISO-8601 format String representing the time from the Unix timestamp. The local timezone will be assumed (though not necessarily displayed) unless the UTC flag is in the opts array.
