OldThink/Content.Shared/Fluids/SharedDrainSystem.cs

using Content.Shared.DoAfter;
using Robust.Shared.Serialization;

namespace Content.Shared.Fluids;

public partial class SharedDrainSystem : EntitySystem
{
    [Serializable, NetSerializable]
    public sealed partial class DrainDoAfterEvent : SimpleDoAfterEvent
    {
    }
}