@property<EOL><INDENT>def end_at(self):<DEDENT>
return self._end_at<EOL>
Gets the end_at of this ModelBreak.
RFC 3339; follows same timezone info as `Shift`. Precision up to the minute is respected; seconds are truncated. The `end_at` minute is not counted when the break length is calculated. For example, a break from `00:00` to `00:11`  is considered a 10 minute break (midnight to 10 minutes after midnight).

:return: The end_at of this ModelBreak.
:rtype: str