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    -subscriptionCollections: Doctrine\ORM\PersistentCollection {#106696 …}
    -apiLastModifiedAt: DateTime @1754517600 {#106665
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    }
    -lastUpdatedAt: DateTime @1628028000 {#106704
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    }
    -author: ""
    -publishedAt: DateTime @143074800 {#106703
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    }
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    -bookCollection: ""
    -pageCount: 12
    -documents: Doctrine\ORM\PersistentCollection {#106694 …}
    -favorites: Doctrine\ORM\PersistentCollection {#106692 …}
  }
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  -mostRecentAttributeCode: "most_recent"
  -localeContext: Sylius\Component\Locale\Context\CompositeLocaleContext {#1833 …}
}