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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
namespace System.ComponentModel
{
/// <summary>
/// The Container and NestedContainer classes will call GetService for ContainerFilterService
/// each time they need to construct a Components collection for return to a caller.
/// ContainerFilterService may return an updated collection of components. This allows
/// an external service to modify the view of components that are returned from a container.
/// </summary>
public abstract class ContainerFilterService
{
protected ContainerFilterService()
{
}
/// <summary>
/// Filters the components collection by optionally returning a new, modified collection.
/// The default implementation returns the input collection, thereby performing no filtering.
/// </summary>
public virtual ComponentCollection FilterComponents(ComponentCollection components) => components;
}
}
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