/**
* Compares this date-time to another date-time.
*
* @param LocalDateTime $that The date-time to compare to.
*
* @return integer [-1,0,1] If this date-time is before, on, or after the given date-time.
*/
public function compareTo(LocalDateTime $that)
{
return $this->date->compareTo($that->date) ?: $this->time->compareTo($that->time);
}