code: public boolean isEqual(ChronoLocalDateTime<?> other) {
          // Do the time check first, it is cheaper than computing EPOCH day.
          return this.toLocalTime().toNanoOfDay() == other.toLocalTime().toNanoOfDay() &&
                 this.toLocalDate().toEpochDay() == other.toLocalDate().toEpochDay();
      }
docs: Checks if this date-time is equal to the specified date-time ignoring the chronology.
  <p>
  This method differs from the comparison in {@link #compareTo} in that it
  only compares the underlying date and time and not the chronology.
  This allows date-times in different calendar systems to be compared based
  on the time-line position.
  
  @param other  the other date-time to compare to, not null
  @return true if the underlying date-time is equal to the specified date-time on the timeline