namespace Microsoft.ML
{
    [DebuggerTypeProxy(typeof(SchemaDebuggerProxy))]
    [DefaultMember("Item")]
    public sealed class DataViewSchema : IEnumerable<Column>, IReadOnlyCollection<Column>, IReadOnlyList<Column>, IEnumerable
    {
        [DebuggerTypeProxy(typeof(AnnotationsDebuggerProxy))]
        public sealed class Annotations
        {
            public sealed class Builder
            {
                public Builder();
            }
        }
    }
}