CatStation/Content.Shared/Pulling/Events/PullMessage.cs

using Robust.Shared.Physics.Components;

namespace Content.Shared.Physics.Pull
{
    public abstract class PullMessage : EntityEventArgs
    {
        public readonly PhysicsComponent Puller;
        public readonly PhysicsComponent Pulled;

        protected PullMessage(PhysicsComponent puller, PhysicsComponent pulled)
        {
            Puller = puller;
            Pulled = pulled;
        }
    }
}