namespace AppKit
{
    [Model]
    [Protocol]
    [Register("NSCollectionViewDataSource", false)]
    public abstract class NSCollectionViewDataSource : NSObject, INSCollectionViewDataSource, INativeObject, IDisposable
    {
        [BindingImpl(BindingImplOptions.GeneratedCode | BindingImplOptions.Optimizable)]
        [Export("collectionView:numberOfItemsInSection:")]
        [Introduced(PlatformName.MacOSX, 10, 11, PlatformArchitecture.All, null)]
        public abstract nint GetNumberofItems(NSCollectionView! collectionView, nint section);
    }
}