Invalidate and remove all calendars from this cache.
Declared in <bdlt_calendarcache.h>
int
invalidateAll();Invalidate all calendars in this calendar cache, and remove them from the cache. Return the number of calendars that were invalidated. Note that a calendar that has been invalidated in the cache remains valid to all outstanding references to it, obtained via earlier calls to the getCalendar and lookupCalendar methods, until all of those references have been destroyed.
number of calendars invalidated