anchor.diff:            method: 'requestTemporaryFullAccuracy',
             result: PlatformException(
               code: 'APPROXIMATE_LOCATION_NOT_SUPPORTED',
  -            message: '',
  +            message: null,
               details: null,
             ),
           );
  
positive.code:           method: 'requestTemporaryFullAccuracy',
            result: PlatformException(
              code: 'ACCURACY_DICTIONARY_NOT_FOUND',
              message: '',
              details: null,
            ),
          );
  
negative.code:           method: 'requestTemporaryFullAccuracy',
            result: PlatformException(
              code: 'PRECISE_ACCURACY_ENABLED',
              message: null,
              details: null,
            ),
          );
  