Mark a variable const
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@ -562,7 +562,7 @@ pdf_object pdf_updater::get(uint n, uint generation) const {
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if (n >= xref_size)
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return {pdf_object::NIL};
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auto& ref = xref[n];
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const auto& ref = xref[n];
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if (ref.free || ref.generation != generation || ref.offset >= document.length())
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return {pdf_object::NIL};
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