-[NSCalendarDate descriptionWithCalendarFormat:] not found

[mulle-nat]

Used by MulleEOAppleCompatibility

../../src/NSCalendarDate+CompatibilityHacks.m:48:18: warning: instance method '-descriptionWithCalendarFormat:' not found (return type defaults to 'id') [-Wobjc-method-access]
   return( [self descriptionWithCalendarFormat:@"%Y-%m-%d %H:%M:%S"]); // oracle compatible... yay
                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../dependency/include/MulleObjCStandardFoundation/NSCalendarDate.h:57:12: note: receiver is instance of class declared here
@interface NSCalendarDate : NSObject < NSDateFactory>
           ^
1 warning generated.