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diff: #ifndef NOVELRT_PERSISTENCE_H
  #define NOVELRT_PERSISTENCE_H
  +// Persistence dependencies
  +#include <vector>
  +#include <gsl/span>
  +#include "../Ecs/Ecs.h"
  +
  namespace NovelRT::Persistence
  {
  - class EcsSnapshot;
  + class Chapter;
  }
  -#include "EcsSnapshot.h"
  +#include "Chapter.h"
  #endif // NOVELRT_PERSISTENCE_H
  