Incomplete Implementation

[Dane2259]

I have been trying to follow along with the tutorial on Apple's developer website: https://developer.apple.com/library/ios/#documentation/iPhone/Conceptual/SecondiOSAppTutorial/Introduction/Introduction.html but cannot figure out why my project will not run. I have one warning: Incomplete implementation in the BirdSightingDataController.m file:

#import "BirdSightingDataController.h"
#import "BirdSighting.h"

@interface BirdSightingDataController ()
- (void)initializeDefaultDataList;
@end

@implementation BirdSightingDataController

@synthesize masterBirdSightingList = _masterBirdSightingList;

- (void) initializeDefaultDataList
{
    NSMutableArray *sightingList = [[NSMutableArray alloc] init];

    self.masterBirdSightingList = sightingList;

    [self addBirdSightingWithName:@"Pigeon" location:@"Everywhere"];
}

- (void)setMasterBirdSightingList:(NSMutableArray *)newList
{
    if (_masterBirdSightingList != newList)
    {
        _masterBirdSightingList = [newList mutableCopy];
    }
}

- (id)init
{
    if (self = [super init])
    {
        [self initializeDefaultDataList];
    }       


    return self;

}

- (NSUInteger)countOfList
{
    return [self.masterBirdSightingList count];
}

- (BirdSighting *)objectAtIndex:(NSUInteger)theIndex
{
    return [self.masterBirdSightingList objectAtIndex:theIndex];
}

- (void)addBirdSightingWithName:(NSString *)inputBirdName location:(NSString *)inputLocation
{
    BirdSighting *sighting;

    NSDate *today = [NSDate date];

    sighting = [[BirdSighting alloc] initWithName:inputBirdName location:inputLocation 
                                                 date:today];
    [self.masterBirdSightingList addObject:sighting];
}
@end

[Dane2259]

For some reason it doesn't like the private method initalizeDefaultDataList (on line 33) that was declared in the interface above the implementation declaration.