diff --git a/CInterface/Battling/Creature.cpp b/CInterface/Battling/Creature.cpp
index f182e1d..09193e1 100644
--- a/CInterface/Battling/Creature.cpp
+++ b/CInterface/Battling/Creature.cpp
@@ -11,10 +11,10 @@ export uint8_t CreatureLib_Creature_Construct(Creature*& out, const BattleLibrar
                                               const char* nickname, bool secretTalent, uint8_t talent,
                                               LearnedAttack* attacks[], size_t attacksNum, bool allowedExperienceGain) {
     Try(auto attacksVec = List<LearnedAttack*>(attacks, attacks + attacksNum);
-        out = new Creature(library, std::shared_ptr<const CreatureLib::Library::CreatureSpecies>(species), variant,
-                           level, experience, uid, gender, coloring,
-                           std::shared_ptr<const CreatureLib::Library::Item>(heldItem), nickname,
-                           CreatureLib::Library::TalentIndex(secretTalent, talent), attacksVec, allowedExperienceGain);)
+        out = new Creature(library, borrowed_ptr<const CreatureLib::Library::CreatureSpecies>(species), variant, level,
+                           experience, uid, gender, coloring, borrowed_ptr<const CreatureLib::Library::Item>(heldItem),
+                           nickname, CreatureLib::Library::TalentIndex(secretTalent, talent), attacksVec,
+                           allowedExperienceGain);)
 };
 
 export void CreatureLib_Creature_Destruct(const Creature* p) { delete p; }
@@ -41,7 +41,7 @@ export uint8_t CreatureLib_Creature_SetHeldItem(Creature* p, const char* name) {
 }
 export uint8_t CreatureLib_Creature_SetHeldItemWithHash(Creature* p, uint32_t hash) { Try(p->SetHeldItem(hash);) }
 export void CreatureLib_Creature_SetHeldItemFromItem(Creature* p, const CreatureLib::Library::Item* item) {
-    return p->SetHeldItem(std::shared_ptr<const CreatureLib::Library::Item>(item));
+    return p->SetHeldItem(borrowed_ptr<const CreatureLib::Library::Item>(item));
 }
 SIMPLE_GET_FUNC(Creature, GetCurrentHealth, uint32_t);
 SIMPLE_GET_FUNC(Creature, GetBattle, Battle*);
@@ -86,7 +86,7 @@ export LearnedAttack* const* CreatureLib_Creature_GetAttacks(Creature* p) { retu
 SIMPLE_GET_FUNC_SMART_PTR(Creature, GetDisplaySpecies, const CreatureLib::Library::CreatureSpecies*);
 SIMPLE_GET_FUNC(Creature, GetDisplayVariant, const CreatureLib::Library::SpeciesVariant*);
 export void CreatureLib_Creature_SetDisplaySpecies(Creature* p, const CreatureLib::Library::CreatureSpecies* species) {
-    return p->SetDisplaySpecies(std::shared_ptr<const CreatureLib::Library::CreatureSpecies>(species));
+    return p->SetDisplaySpecies(borrowed_ptr<const CreatureLib::Library::CreatureSpecies>(species));
 }
 export void CreatureLib_Creature_SetDisplayVariant(Creature* p, const CreatureLib::Library::SpeciesVariant* variant) {
     return p->SetDisplayVariant(variant);
diff --git a/CInterface/Battling/LearnedAttack.cpp b/CInterface/Battling/LearnedAttack.cpp
index 4035b22..3f950b9 100644
--- a/CInterface/Battling/LearnedAttack.cpp
+++ b/CInterface/Battling/LearnedAttack.cpp
@@ -4,7 +4,7 @@ using namespace CreatureLib::Battling;
 
 export uint8_t CreatureLib_LearnedAttack_Construct(LearnedAttack*& out, const CreatureLib::Library::AttackData* attack,
                                                    uint8_t maxUses, AttackLearnMethod learnMethod) {
-    Try(out = new LearnedAttack(std::shared_ptr<const CreatureLib::Library::AttackData>(attack), maxUses, learnMethod);)
+    Try(out = new LearnedAttack(borrowed_ptr<const CreatureLib::Library::AttackData>(attack), maxUses, learnMethod);)
 }
 export void CreatureLib_LearnedAttack_Destruct(LearnedAttack* p) { delete p; }
 
diff --git a/CInterface/Library/BaseLibrary.cpp b/CInterface/Library/BaseLibrary.cpp
index 2f23279..7a72d88 100644
--- a/CInterface/Library/BaseLibrary.cpp
+++ b/CInterface/Library/BaseLibrary.cpp
@@ -16,14 +16,14 @@
     export uint8_t simpleName##_DeleteWithHash(fullname* p, uint32_t hashedKey) { Try(p->Delete(hashedKey);) }         \
                                                                                                                        \
     export bool simpleName##_TryGet(fullname* p, const char* name, const returnType*& out) {                           \
-        std::shared_ptr<const returnType> o;                                                                           \
+        borrowed_ptr<const returnType> o;                                                                              \
         auto v = p->TryGet(Arbutils::CaseInsensitiveConstString::GetHash(name), o);                                    \
         out = o.operator->();                                                                                          \
         return v;                                                                                                      \
     }                                                                                                                  \
                                                                                                                        \
     export bool simpleName##_TryGetWithHash(fullname* p, uint32_t hashedKey, const returnType*& out) {                 \
-        std::shared_ptr<const returnType> o;                                                                           \
+        borrowed_ptr<const returnType> o;                                                                              \
         auto v = p->TryGet(hashedKey, o);                                                                              \
         out = o.operator->();                                                                                          \
         return v;                                                                                                      \
diff --git a/src/Battling/Library/MiscLibrary.cpp b/src/Battling/Library/MiscLibrary.cpp
index 02879fe..0cad651 100644
--- a/src/Battling/Library/MiscLibrary.cpp
+++ b/src/Battling/Library/MiscLibrary.cpp
@@ -11,12 +11,12 @@ bool CreatureLib::Battling::MiscLibrary::IsCritical(CreatureLib::Battling::Execu
 }
 
 static CreatureLib::Battling::LearnedAttack* _replacementAttack = nullptr;
-static std::shared_ptr<const CreatureLib::Library::AttackData> _replacementAttackData = nullptr;
+static std::unique_ptr<const CreatureLib::Library::AttackData> _replacementAttackData = nullptr;
 
-static const std::shared_ptr<const CreatureLib::Library::AttackData>& GetReplacementAttackData() {
+static borrowed_ptr<const CreatureLib::Library::AttackData> GetReplacementAttackData() {
     if (_replacementAttackData == nullptr) {
         _replacementAttackData =
-            std::shared_ptr<const CreatureLib::Library::AttackData>(new CreatureLib::Library::AttackData(
+            std::unique_ptr<const CreatureLib::Library::AttackData>(new CreatureLib::Library::AttackData(
                 "replacement"_cnc, 0, CreatureLib::Library::AttackCategory::Physical, 30, 255, 255,
                 CreatureLib::Library::AttackTarget::Any, 0, new CreatureLib::Library::SecondaryEffect(), {}));
     }
diff --git a/src/Battling/Models/CreateCreature.cpp b/src/Battling/Models/CreateCreature.cpp
index 00fa248..ad966b7 100644
--- a/src/Battling/Models/CreateCreature.cpp
+++ b/src/Battling/Models/CreateCreature.cpp
@@ -25,14 +25,14 @@ CreateCreature CreateCreature::WithAttack(const Arbutils::CaseInsensitiveConstSt
     if (_attacks.Count() >= _library->GetSettings()->GetMaximalMoves())
         throw CreatureException("You have already set the maximum amount of allowed moves.");
 
-    auto attackData = _library->GetAttackLibrary()->Get(attackName);
+    auto attackData = _library->GetAttackLibrary()->Get(attackName.GetHash());
     _attacks.Append(std::tuple(attackData, learnMethod));
     return *this;
 }
 
 Creature* CreateCreature::Create() {
     auto rand = Arbutils::Random();
-    auto& species = this->_library->GetSpeciesLibrary()->Get(this->_species);
+    auto species = this->_library->GetSpeciesLibrary()->Get(this->_species.GetHash());
     auto variant = species->GetVariant(this->_variant);
     Library::TalentIndex talent;
     if (this->_talent.Empty()) {
@@ -48,7 +48,7 @@ Creature* CreateCreature::Create() {
     if (gender == static_cast<Library::Gender>(-1)) {
         gender = species->GetRandomGender(rand);
     }
-    std::shared_ptr<const Library::Item> heldItem = nullptr;
+    borrowed_ptr<const Library::Item> heldItem;
     if (!this->_heldItem.Empty()) {
         if (!_library->GetItemLibrary()->TryGet(this->_heldItem.GetHash(), heldItem)) {
             throw CreatureException("Invalid held item.");
diff --git a/src/Battling/Models/CreateCreature.hpp b/src/Battling/Models/CreateCreature.hpp
index 7716703..5d9d7fc 100644
--- a/src/Battling/Models/CreateCreature.hpp
+++ b/src/Battling/Models/CreateCreature.hpp
@@ -21,7 +21,7 @@ namespace CreatureLib::Battling {
         uint8_t _coloring = 0;
         Arbutils::CaseInsensitiveConstString _heldItem = ""_cnc;
         uint32_t _identifier = 0;
-        List<std::tuple<std::shared_ptr<const Library::AttackData>, AttackLearnMethod>> _attacks;
+        List<std::tuple<borrowed_ptr<const Library::AttackData>, AttackLearnMethod>> _attacks;
 
     public:
         CreateCreature(const BattleLibrary* library, const Arbutils::CaseInsensitiveConstString& species, uint8_t level)
diff --git a/src/Battling/Models/Creature.cpp b/src/Battling/Models/Creature.cpp
index 5c65ddb..bd62105 100644
--- a/src/Battling/Models/Creature.cpp
+++ b/src/Battling/Models/Creature.cpp
@@ -6,13 +6,11 @@
 
 using namespace CreatureLib;
 
-Battling::Creature::Creature(const BattleLibrary* library,
-                             const std::shared_ptr<const Library::CreatureSpecies>& species,
+Battling::Creature::Creature(const BattleLibrary* library, const borrowed_ptr<const Library::CreatureSpecies>& species,
                              const Library::SpeciesVariant* variant, uint8_t level, uint32_t experience, uint32_t uid,
-                             Library::Gender gender, uint8_t coloring,
-                             const std::shared_ptr<const Library::Item> heldItem, std::string nickname,
-                             const Library::TalentIndex& talent, const List<LearnedAttack*>& attacks,
-                             bool allowedExperienceGain)
+                             Library::Gender gender, uint8_t coloring, const borrowed_ptr<const Library::Item> heldItem,
+                             std::string nickname, const Library::TalentIndex& talent,
+                             const List<LearnedAttack*>& attacks, bool allowedExperienceGain)
     : _library(library), _species(species), _variant(variant), _level(level), _experience(experience),
       _uniqueIdentifier(uid), _gender(gender), _coloring(coloring), _heldItem(heldItem), _nickname(std::move(nickname)),
       _talentIndex(talent), _hasOverridenTalent(false), _attacks(attacks),
@@ -187,7 +185,7 @@ void Battling::Creature::AddExperience(uint32_t amount) {
     _experience = exp;
     _level = level;
 }
-std::shared_ptr<const Library::CreatureSpecies> Battling::Creature::GetDisplaySpecies() const noexcept {
+borrowed_ptr<const Library::CreatureSpecies> Battling::Creature::GetDisplaySpecies() const noexcept {
     auto species = _displaySpecies;
     if (species == nullptr)
         species = _species;
@@ -200,14 +198,14 @@ const Library::SpeciesVariant* Battling::Creature::GetDisplayVariant() const noe
     return variant;
 }
 void Battling::Creature::SetHeldItem(const ConstString& itemName) {
-    std::shared_ptr<const Library::Item> item;
+    borrowed_ptr<const Library::Item> item;
     if (!_library->GetItemLibrary()->TryGet(itemName.GetHash(), item)) {
         throw CreatureException("Item not found.");
     }
     _heldItem = item;
 }
 void Battling::Creature::SetHeldItem(uint32_t itemNameHash) {
-    std::shared_ptr<const Library::Item> item;
+    borrowed_ptr<const Library::Item> item;
     if (!_library->GetItemLibrary()->TryGet(itemNameHash, item)) {
         throw CreatureException("Item not found.");
     }
diff --git a/src/Battling/Models/Creature.hpp b/src/Battling/Models/Creature.hpp
index 1ba2345..60101e4 100644
--- a/src/Battling/Models/Creature.hpp
+++ b/src/Battling/Models/Creature.hpp
@@ -2,6 +2,7 @@
 #define CREATURELIB_BATTLECREATURE_HPP
 
 #include <Arbutils/Collections/List.hpp>
+#include <Arbutils/Memory/borrowed_ptr.hpp>
 #include "../../Library/ClampedStatisticSet.hpp"
 #include "../../Library/CreatureData/CreatureSpecies.hpp"
 #include "../../Library/Items/Item.hpp"
@@ -23,10 +24,10 @@ namespace CreatureLib::Battling {
     protected:
         const BattleLibrary* _library;
 
-        std::shared_ptr<const Library::CreatureSpecies> _species;
+        borrowed_ptr<const Library::CreatureSpecies> _species;
         const Library::SpeciesVariant* _variant;
 
-        std::shared_ptr<const Library::CreatureSpecies> _displaySpecies = nullptr;
+        borrowed_ptr<const Library::CreatureSpecies> _displaySpecies = nullptr;
         const Library::SpeciesVariant* _displayVariant = nullptr;
 
         uint8_t _level;
@@ -34,7 +35,7 @@ namespace CreatureLib::Battling {
         uint32_t _uniqueIdentifier;
         Library::Gender _gender;
         uint8_t _coloring;
-        std::shared_ptr<const Library::Item> _heldItem;
+        borrowed_ptr<const Library::Item> _heldItem;
         uint32_t _currentHealth;
 
         Library::ClampedStatisticSet<int8_t, -6, 6> _statBoost;
@@ -63,9 +64,9 @@ namespace CreatureLib::Battling {
         void OnFaint();
 
     public:
-        Creature(const BattleLibrary* library, const std::shared_ptr<const Library::CreatureSpecies>& species,
+        Creature(const BattleLibrary* library, const borrowed_ptr<const Library::CreatureSpecies>& species,
                  const Library::SpeciesVariant* variant, uint8_t level, uint32_t experience, uint32_t uid,
-                 Library::Gender gender, uint8_t coloring, const std::shared_ptr<const Library::Item> heldItem,
+                 Library::Gender gender, uint8_t coloring, const borrowed_ptr<const Library::Item> heldItem,
                  std::string nickname, const Library::TalentIndex& talent, const List<LearnedAttack*>& attacks,
                  bool allowedExperienceGain = true);
 
@@ -82,7 +83,7 @@ namespace CreatureLib::Battling {
             _currentHealth = GetBoostedStat(Library::Statistic::Health);
         }
 
-        inline const std::shared_ptr<const Library::CreatureSpecies>& GetSpecies() const noexcept { return _species; }
+        inline const borrowed_ptr<const Library::CreatureSpecies>& GetSpecies() const noexcept { return _species; }
         inline const Library::SpeciesVariant* GetVariant() const noexcept { return _variant; }
         inline uint8_t GetLevel() const noexcept { return _level; }
         inline uint32_t GetExperience() const noexcept { return _experience; }
@@ -94,10 +95,10 @@ namespace CreatureLib::Battling {
         inline bool HasHeldItem(uint32_t nameHash) const noexcept {
             return _heldItem != nullptr && _heldItem->GetName() == nameHash;
         }
-        inline const std::shared_ptr<const Library::Item>& GetHeldItem() const noexcept { return _heldItem; }
+        inline const borrowed_ptr<const Library::Item>& GetHeldItem() const noexcept { return _heldItem; }
         void SetHeldItem(const ConstString& itemName);
         void SetHeldItem(uint32_t itemNameHash);
-        inline void SetHeldItem(const std::shared_ptr<const Library::Item>& item) noexcept { _heldItem = item; };
+        inline void SetHeldItem(const borrowed_ptr<const Library::Item>& item) noexcept { _heldItem = item; };
 
         inline uint32_t GetCurrentHealth() const noexcept { return _currentHealth; }
 
@@ -135,10 +136,10 @@ namespace CreatureLib::Battling {
 
         const List<LearnedAttack*>& GetAttacks() noexcept { return _attacks; }
 
-        std::shared_ptr<const Library::CreatureSpecies> GetDisplaySpecies() const noexcept;
+        borrowed_ptr<const Library::CreatureSpecies> GetDisplaySpecies() const noexcept;
         const Library::SpeciesVariant* GetDisplayVariant() const noexcept;
 
-        void SetDisplaySpecies(const std::shared_ptr<const Library::CreatureSpecies>& species) noexcept {
+        void SetDisplaySpecies(const borrowed_ptr<const Library::CreatureSpecies>& species) noexcept {
             _displaySpecies = species;
         }
         void SetDisplayVariant(const Library::SpeciesVariant* variant) noexcept { _displayVariant = variant; };
diff --git a/src/Battling/Models/LearnedAttack.cpp b/src/Battling/Models/LearnedAttack.cpp
index bac76b7..97e335e 100644
--- a/src/Battling/Models/LearnedAttack.cpp
+++ b/src/Battling/Models/LearnedAttack.cpp
@@ -1,19 +1,18 @@
 #include "LearnedAttack.hpp"
 #include <Arbutils/Assert.hpp>
-CreatureLib::Battling::LearnedAttack::LearnedAttack(
-    const std::shared_ptr<const CreatureLib::Library::AttackData>& attack, uint8_t maxUses,
-    AttackLearnMethod learnMethod)
+CreatureLib::Battling::LearnedAttack::LearnedAttack(const borrowed_ptr<const CreatureLib::Library::AttackData>& attack,
+                                                    uint8_t maxUses, AttackLearnMethod learnMethod)
     : _attack(attack), _maxUses(maxUses), _remainingUses(maxUses), _learnMethod(learnMethod) {
     AssertNotNull(_attack)
 }
 
-CreatureLib::Battling::LearnedAttack::LearnedAttack(
-    const std::shared_ptr<const CreatureLib::Library::AttackData>& attack, AttackLearnMethod learnMethod)
+CreatureLib::Battling::LearnedAttack::LearnedAttack(const borrowed_ptr<const CreatureLib::Library::AttackData>& attack,
+                                                    AttackLearnMethod learnMethod)
     : _attack(attack), _maxUses(attack->GetBaseUsages()), _remainingUses(_maxUses), _learnMethod(learnMethod) {
     AssertNotNull(_attack)
 }
 
-const std::shared_ptr<const CreatureLib::Library::AttackData>&
+const borrowed_ptr<const CreatureLib::Library::AttackData>&
 CreatureLib::Battling::LearnedAttack::GetAttack() const noexcept {
     return _attack;
 }
diff --git a/src/Battling/Models/LearnedAttack.hpp b/src/Battling/Models/LearnedAttack.hpp
index 8ee83b1..88584fb 100644
--- a/src/Battling/Models/LearnedAttack.hpp
+++ b/src/Battling/Models/LearnedAttack.hpp
@@ -1,26 +1,27 @@
 #ifndef CREATURELIB_LEARNEDATTACK_HPP
 #define CREATURELIB_LEARNEDATTACK_HPP
 
+#include <Arbutils/Memory/borrowed_ptr.hpp>
 #include <memory>
 #include "../../Library/Attacks/AttackData.hpp"
 #include "AttackLearnMethod.hpp"
 
 namespace CreatureLib::Battling {
     class LearnedAttack {
-        std::shared_ptr<const Library::AttackData> _attack;
+        borrowed_ptr<const Library::AttackData> _attack;
         uint8_t _maxUses;
         uint8_t _remainingUses;
         AttackLearnMethod _learnMethod;
 
     public:
-        LearnedAttack(const std::shared_ptr<const CreatureLib::Library::AttackData>& attack, uint8_t maxUses,
+        LearnedAttack(const borrowed_ptr<const CreatureLib::Library::AttackData>& attack, uint8_t maxUses,
                       AttackLearnMethod learnMethod);
-        LearnedAttack(const std::shared_ptr<const CreatureLib::Library::AttackData>& attack,
+        LearnedAttack(const borrowed_ptr<const CreatureLib::Library::AttackData>& attack,
                       AttackLearnMethod learnMethod);
 
         virtual ~LearnedAttack() = default;
 
-        const std::shared_ptr<const Library::AttackData>& GetAttack() const noexcept;
+        const borrowed_ptr<const Library::AttackData>& GetAttack() const noexcept;
         uint8_t GetMaxUses() const noexcept;
         uint8_t GetRemainingUses() const noexcept;
         AttackLearnMethod GetLearnMethod() const noexcept;
diff --git a/src/Library/BaseLibrary.hpp b/src/Library/BaseLibrary.hpp
index 8cfdd14..9338fa2 100644
--- a/src/Library/BaseLibrary.hpp
+++ b/src/Library/BaseLibrary.hpp
@@ -5,6 +5,7 @@
 #include <Arbutils/Collections/Dictionary.hpp>
 #include <Arbutils/Collections/List.hpp>
 #include <Arbutils/ConstString.hpp>
+#include <Arbutils/Memory/borrowed_ptr.hpp>
 #include <Arbutils/Random.hpp>
 #include <algorithm>
 #include <memory>
@@ -12,7 +13,7 @@
 
 namespace CreatureLib::Library {
     template <class T> class BaseLibrary {
-        Arbutils::Collections::Dictionary<uint32_t, std::shared_ptr<const T>> _values;
+        Arbutils::Collections::Dictionary<uint32_t, std::unique_ptr<const T>> _values;
         Arbutils::Collections::List<uint32_t> _listValues;
         size_t _index;
 
@@ -23,12 +24,12 @@ namespace CreatureLib::Library {
 
         inline void Insert(const Arbutils::CaseInsensitiveConstString& key, const T* value) {
             AssertNotNull(value)
-            _values.Insert(key.GetHash(), value);
+            _values.GetStdMap().insert({key.GetHash(), std::unique_ptr<const T>(value)});
             _listValues.Append(key);
         }
         inline void Insert(uint32_t hashedKey, const T* value) {
             AssertNotNull(value)
-            _values.Insert(hashedKey, std::shared_ptr<const T>(value));
+            _values.GetStdMap().insert({hashedKey, std::unique_ptr<const T>(value)});
             _listValues.Append(hashedKey);
         }
 
@@ -43,38 +44,38 @@ namespace CreatureLib::Library {
             _listValues.Remove(k);
         }
 
-        bool TryGet(const Arbutils::CaseInsensitiveConstString& name, const std::shared_ptr<const T>& out) const {
+        bool TryGet(const Arbutils::CaseInsensitiveConstString& name, borrowed_ptr<const T>& out) const {
             return TryGet(name.GetHash(), out);
         }
-        bool TryGet(uint32_t hashedKey, std::shared_ptr<const T>& out) const { return _values.TryGet(hashedKey, out); }
+        bool TryGet(uint32_t hashedKey, borrowed_ptr<const T>& out) const {
+            auto find = _values.GetStdMap().find(hashedKey);
+            if (find == _values.GetStdMap().end())
+                return false;
+            out = std::get<1>(*find);
+            return true;
+        }
 
-        [[nodiscard]] inline const std::shared_ptr<const T>&
-        Get(const Arbutils::CaseInsensitiveConstString& name) const {
+        [[nodiscard]] inline borrowed_ptr<const T> Get(const Arbutils::CaseInsensitiveConstString& name) const {
             return _values.Get(name.GetHash());
         }
-        [[nodiscard]] inline const std::shared_ptr<const T>& Get(uint32_t hashedKey) const {
-            return _values.Get(hashedKey);
-        }
+        [[nodiscard]] inline borrowed_ptr<const T> Get(uint32_t hashedKey) { return _values.Get(hashedKey); }
 
-        [[nodiscard]] inline const std::shared_ptr<const T>&
-        operator[](const Arbutils::CaseInsensitiveConstString& name) const {
+        [[nodiscard]] inline borrowed_ptr<const T> operator[](const Arbutils::CaseInsensitiveConstString& name) const {
             return Get(name);
         }
-        [[nodiscard]] inline const std::shared_ptr<const T>& operator[](uint32_t hashedKey) const {
-            return Get(hashedKey);
-        }
-        [[nodiscard]] inline const Arbutils::Collections::Dictionary<uint32_t, const std::shared_ptr<const T>>&
+        [[nodiscard]] inline borrowed_ptr<const T> operator[](uint32_t hashedKey) const { return Get(hashedKey); }
+        [[nodiscard]] inline const Arbutils::Collections::Dictionary<uint32_t, const std::unique_ptr<const T>>&
         GetIterator() const {
             return _values;
         }
 
         [[nodiscard]] size_t GetCount() const { return _values.Count(); }
 
-        inline const std::shared_ptr<const T>& GetRandomValue(Arbutils::Random rand = Arbutils::Random()) const {
+        inline borrowed_ptr<const T> GetRandomValue(Arbutils::Random rand = Arbutils::Random()) const {
             auto i = rand.Get(_listValues.Count());
             return _values[_listValues[i]];
         }
-        inline const std::shared_ptr<const T>& GetRandomValue(Arbutils::Random* rand) const {
+        inline borrowed_ptr<const T> GetRandomValue(Arbutils::Random* rand) const {
             auto i = rand->Get(_listValues.Count());
             return _values[_listValues[i]];
         }