message: commit before checkout for fix.
diff: */
  namespace NovelRT::Ecs
  {
  + class Builder;
  class Catalogue;
  class ComponentBufferMemoryContainer;
  class ComponentCache;
  @@ -63,6 +64,7 @@ namespace NovelRT::Ecs
  #include "Catalogue.h"
  #include "SystemScheduler.h"
  #include "UnsafeComponentView.h"
  +#include "Builder.h"
  // clang-format on
  