Sic02/FrameworkLocal/UIClient/Caliburn.Micro/Core/IHaveActiveItem.cs

namespace Caliburn.Micro.Core {
    /// <summary>
    /// Denotes an instance which maintains an active item.
    /// </summary>
    public interface IHaveActiveItem {
        /// <summary>
        /// The currently active item.
        /// </summary>
        object ActiveItem { get; set; }
    }
}