darling-cocotron/QuartzCore/CATransactionGroup.m

#import "CATransactionGroup.h"
#import <Foundation/NSDictionary.h>
#import <Foundation/NSNumber.h>
#import <QuartzCore/CATransaction.h>

@implementation CATransactionGroup

- init {
    _values = [[NSMutableDictionary alloc] init];
    [_values setObject: [NSNumber numberWithFloat: 0.25]
                forKey: kCATransactionAnimationDuration];
    [_values setObject: [NSNumber numberWithBool: NO]
                forKey: kCATransactionDisableActions];
    // kCATransactionAnimationTimingFunction default is nil
    // kCATransactionCompletionBlock default is nil
    return self;
}

- valueForKey: (NSString *) key {
    return [_values objectForKey: key];
}

- (void) setValue: value forKey: (NSString *) key {
    [_values setObject: value forKey: key];
}

@end