using System;
using Caliburn.StateManagement;

namespace Caliburn.Services
{
    public interface IShellState
    {
        void SetValue<T>(string key, T value) where T : IPersistable, new();
        T GetValue<T>(string key) where T : IPersistable, new();

        bool IsLoaded { get; }

        event Action Loaded;
        event Action Saving;

        void Load();
        void Save();
    }
}