Looks like a copy and paste issue of a comment from below.
/**
* Determines whether or not the number of assets is shown in the Album list.
* The number of assets is visible by default.
*/
@property (nonatomic, strong) NSArray* customSmartCollections;
...
/**
* Determines whether or not the number of assets is shown in the Album list.
* The number of assets is visible by default.
*/
@property (nonatomic, assign) BOOL displayAlbumsNumberOfAssets;
The first one should be changed to reflect the property, I'm not super familiar or I'd submit a pull request. Maybe I can try to help later this week.