Concept definition

template<typename T>
concept oscr::GpuGraphicsNode2 =  requires { T::layout::graphics; }
      && (avnd::geometry_input_introspection<T>::size == 0)
      && (avnd::geometry_output_introspection<T>::size == 0)
      && (scene_input_introspection<T>::size == 0)
      && (scene_output_introspection<T>::size == 0)