reactive/Rx.NET/Source/src/System.Reactive/Internal/IConcatenatable.cs

// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the Apache 2.0 License.
// See the LICENSE file in the project root for more information. 

using System.Collections.Generic;

namespace System.Reactive
{
    internal interface IConcatenatable<out TSource>
    {
        IEnumerable<IObservable<TSource>> GetSources();
    }
}