Return the number of non-business days in the valid range.
Declared in <bdlt_calendar.h>
int
numNonBusinessDays() const;
Return the number of days in the valid range of this calendar that are not considered business days -- i.e., are either holidays, weekend days, or both. Note that numNonBusinessDays() == length() - numBusinessDays().
the number of non-business days in the valid range