-(id)initWithMessage:(NSString *)message

- (void)test010_broadcastWait
{
    ...
    GDataXMLDocument *doc = [[GDataXMLDocument alloc] initWithData:xmlData
                                                           options:0 error:&error];
    Brick *newBrick = [self.parser loadBroadcastWaitBrick:doc.rootElement];
    if (![newBrick isMemberOfClass:[BroadcastWaitBrick class]])
        STFail(@"Wrong class-member");
    ....
}

@implementation BroadcastWaitBrick

-(id)initWithMessage:(NSString *)message
{
    self = [super init];
    if (self)
    {
        self.message = message;
    }
    return self;
}

...

-(BroadcastWaitBrick*)loadBroadcastWaitBrick:(GDataXMLElement*)gDataXMLElement
{


    NSArray *messages = [gDataXMLElement elementsForName:@"broadcastMessage"];
    GDataXMLElement *message = (GDataXMLElement*)[messages objectAtIndex:0];

    BroadcastWaitBrick* brick = [[BroadcastWaitBrick alloc]initWithMessage:message.stringValue];

    return brick;
}