abp/framework/src/Volo.Abp.Security/Volo/Abp/Users/ICurrentImpersonatorUser.cs

using System;
using JetBrains.Annotations;

namespace Volo.Abp.Users
{
    public interface ICurrentImpersonatorUser
    {
        [CanBeNull]
        Guid? Id { get; }
    }
}