CPDF_Object* CPDF_Stream::Clone() const { return CloneObjectNonCyclic(false); }
CPDF_Object* CPDF_Reference::Clone() const { return CloneObjectNonCyclic(false); }
CPDF_Object* CPDF_Array::Clone() const { return CloneObjectNonCyclic(false); }
std::unique_ptr<CPDF_Object> CPDF_Stream::Clone() const { return CloneObjectNonCyclic(false); }
std::unique_ptr<CPDF_Object> CPDF_Object::CloneDirectObject() const { return CloneObjectNonCyclic(true); }