in service/src/main/java/org/apache/fineract/cn/individuallending/internal/service/schedule/Period.java [114:123]
private static int compareNullableDates(final LocalDate x, final LocalDate y) {
if ((x == null) && (y == null))
return 0;
else if ((x == null) && (y != null))
return -1;
else if ((x != null) && (y == null))
return 1;
else
return x.compareTo(y);
}