I used The ECS of Unity2018.2. I upgrade to Unity2019.2.0. where is position component? where is rotation component? where is scale component? where is RenderMesh component? Only "xxx Proxy" I use ConvertToEntity.cs，and Select 'Convert and destroy'. GameObject is destroy. But GameObject is visible in ECSDemo. In ECS, How to use Unity2019.2.0？it is not esay than Unity2018.2.