Compares this date-time to another date-time.
!(p)
The comparison is primarily based on the date-time, from earliest to latest.
It is "consistent with equals", as defined by {@link Comparable}.
!(p)
If all the date-times being compared are instances of {@code LocalDateTime},
then the comparison will be entirely based on the date-time.
If some dates being compared are _in different chronologies, then the
chronology is also considered, see {@link ChronoLocalDateTime#compareTo}.
@param other the other date-time to compare to, not null
@return the comparator value, negative if less, positive if greater
Compares this date-time to another date-time. !(p) The comparison is primarily based on the date-time, from earliest to latest. It is "consistent with equals", as defined by {@link Comparable}. !(p) If all the date-times being compared are instances of {@code LocalDateTime}, then the comparison will be entirely based on the date-time. If some dates being compared are _in different chronologies, then the chronology is also considered, see {@link ChronoLocalDateTime#compareTo}.
@param other the other date-time to compare to, not null @return the comparator value, negative if less, positive if greater