osu/osu.Game/Database/IModelManager.cs

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// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.
using System;
namespace osu.Game.Database
{
/// <summary>
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/// Represents a model manager that publishes events when <typeparamref name="TModel"/>s are added or removed.
/// </summary>
/// <typeparam name="TModel">The model type.</typeparam>
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public interface IModelManager<out TModel>
where TModel : class
{
event Action<TModel> ItemAdded;
event Action<TModel> ItemRemoved;
}
}