anchor.diff:  module RigidBodyFacetModule =
   
       type Entity with
  -
  -        member this.GetMinorId world : Guid = this.Get Property? MinorId world
  -        member this.SetMinorId (value : Guid) world = this.SetFast Property? MinorId false false value world
  -        member this.MinorId = Lens.make Property? MinorId this.GetMinorId this.SetMinorId this
  +    
           member this.GetBodyType world : BodyType = this.Get Property? BodyType world
           member this.SetBodyType (value : BodyType) world = this.SetFast Property? BodyType false false value world
           member this.BodyType = Lens.make Property? BodyType this.GetBodyType this.SetBodyType this
  
positive.code:         member this.GetIsSensor world : bool = this.Get Property? IsSensor world
          member this.SetIsSensor (value : bool) world = this.SetFast Property? IsSensor false false value world
          member this.IsSensor = Lens.make Property? IsSensor this.GetIsSensor this.SetIsSensor this
          member this.GetPhysicsId world = { SourceId = this.GetId world; BodyId = this.GetMinorId world }
          member this.PhysicsId = Lens.makeReadOnly Property? PhysicsId this.GetPhysicsId this
          member this.CollisionEvent = Events.Collision --> this
  
  
negative.code:             PhysicsEngine.localizeCollisionBody (entity.GetSize world) (entity.GetCollisionBody world)
  
          static member Properties =
              [define Entity.BodyType Dynamic
               define Entity.Awake true
               define Entity.Density Constants.Physics.NormalDensity
               define Entity.Friction 0.2f
  