namespace Microsoft.Data.DataView
{
    [DebuggerTypeProxy(typeof(SchemaDebuggerProxy))]
    [DefaultMember("Item")]
    public sealed class DataViewSchema : IEnumerable<Column>, IReadOnlyCollection<Column>, IReadOnlyList<Column>, IEnumerable
    {
        public struct DetachedColumn
        {
            public DetachedColumn(string name, DataViewType type, Annotations annotations = null);
        }
    }
}