diff --git a/firestore/src/common/local_cache_settings.cc b/firestore/src/common/local_cache_settings.cc
index c1b897b865..b5ea995ed1 100644
--- a/firestore/src/common/local_cache_settings.cc
+++ b/firestore/src/common/local_cache_settings.cc
@@ -17,7 +17,6 @@
 #include "firestore/src/include/firebase/firestore/local_cache_settings.h"
 #include <memory>
 
-#include "Firestore/core/src/api/settings.h"
 #include "firestore/src/common/hard_assert_common.h"
 #if defined(__ANDROID__)
 #else
@@ -27,55 +26,44 @@
 namespace firebase {
 namespace firestore {
 
-namespace {
-using CoreCacheSettings = api::LocalCacheSettings;
-using CorePersistentSettings = api::PersistentCacheSettings;
-using CoreMemorySettings = api::MemoryCacheSettings;
-using CoreMemoryGarbageCollectorSettings = api::MemoryGargabeCollectorSettings;
-using CoreMemoryEagerGcSettings = api::MemoryEagerGcSettings;
-using CoreMemoryLruGcSettings = api::MemoryLruGcSettings;
-}  // namespace
-
 PersistentCacheSettings PersistentCacheSettings::Create() { return {}; }
 
 PersistentCacheSettings::PersistentCacheSettings() {
-  settings_internal_ = std::make_shared<PersistentCacheSettingsInternal>(
-      CorePersistentSettings{});
+  settings_internal_ = std::make_shared<PersistentCacheSettingsInternal>();
 }
 
 PersistentCacheSettings PersistentCacheSettings::WithSizeBytes(
     int64_t size) const {
-  PersistentCacheSettings new_settings{*this};
-  new_settings.settings_internal_->set_core_settings(
-      new_settings.settings_internal_->core_settings().WithSizeBytes(size));
+  PersistentCacheSettings new_settings;
+  new_settings.settings_internal_ =
+      std::make_shared<PersistentCacheSettingsInternal>(
+          this->settings_internal_->WithSizeBytes(size));
   return new_settings;
 }
 
 int64_t PersistentCacheSettings::size_bytes() const {
-  return settings_internal_->core_settings().size_bytes();
+  return settings_internal_->size_bytes();
 }
 
-const CoreCacheSettings& PersistentCacheSettings::core_settings() const {
-  return settings_internal_->core_settings();
+const LocalCacheSettingsInternal& PersistentCacheSettings::internal() const {
+  return *settings_internal_;
 }
 
 MemoryEagerGCSettings MemoryEagerGCSettings::Create() { return {}; }
 
 MemoryEagerGCSettings::MemoryEagerGCSettings() {
-  settings_internal_ = std::make_shared<MemoryEagerGCSettingsInternal>(
-      CoreMemoryEagerGcSettings{});
+  settings_internal_ = std::make_shared<MemoryEagerGCSettingsInternal>();
 }
 
-const CoreMemoryGarbageCollectorSettings& MemoryEagerGCSettings::core_settings()
+const MemoryGarbageCollectorSettingsInternal& MemoryEagerGCSettings::internal()
     const {
-  return settings_internal_->core_settings();
+  return *settings_internal_;
 }
 
 MemoryLruGCSettings MemoryLruGCSettings::Create() { return {}; }
 
 MemoryLruGCSettings::MemoryLruGCSettings() {
-  settings_internal_ =
-      std::make_shared<MemoryLruGCSettingsInternal>(CoreMemoryLruGcSettings{});
+  settings_internal_ = std::make_shared<MemoryLruGCSettingsInternal>();
 }
 
 MemoryLruGCSettings::MemoryLruGCSettings(
@@ -84,42 +72,41 @@ MemoryLruGCSettings::MemoryLruGCSettings(
 }
 
 MemoryLruGCSettings MemoryLruGCSettings::WithSizeBytes(int64_t size) {
-  return {MemoryLruGCSettingsInternal{
-      settings_internal_->core_settings().WithSizeBytes(size)}};
+  MemoryLruGCSettings result;
+  result.settings_internal_ = std::make_shared<MemoryLruGCSettingsInternal>(
+      this->settings_internal_->WithSizeBytes(size));
+  return result;
 }
 
 int64_t MemoryLruGCSettings::size_bytes() const {
-  return settings_internal_->core_settings().size_bytes();
+  return settings_internal_->size_bytes();
 }
 
-const CoreMemoryGarbageCollectorSettings& MemoryLruGCSettings::core_settings()
+const MemoryGarbageCollectorSettingsInternal& MemoryLruGCSettings::internal()
     const {
-  return settings_internal_->core_settings();
+  return *settings_internal_;
 }
 
 MemoryCacheSettings MemoryCacheSettings::Create() { return {}; }
 
 MemoryCacheSettings::MemoryCacheSettings() {
-  settings_internal_ =
-      std::make_shared<MemoryCacheSettingsInternal>(CoreMemorySettings{});
+  settings_internal_ = std::make_shared<MemoryCacheSettingsInternal>();
 }
 
 MemoryCacheSettings MemoryCacheSettings::WithGarbageCollectorSettings(
     const MemoryGarbageCollectorSettings& settings) const {
-  MemoryCacheSettings result{*this};
-  CoreMemorySettings core_settings = result.settings_internal_->core_settings();
-  result.settings_internal_->set_core_settings(
-      core_settings.WithMemoryGarbageCollectorSettings(
-          settings.core_settings()));
+  MemoryCacheSettings result;
+  result.settings_internal_ = std::make_shared<MemoryCacheSettingsInternal>(
+      this->settings_internal_->WithGarbageCollectorSettings(settings));
   return result;
 }
 
-const CoreCacheSettings& MemoryCacheSettings::core_settings() const {
-  return settings_internal_->core_settings();
+const LocalCacheSettingsInternal& MemoryCacheSettings::internal() const {
+  return *settings_internal_;
 }
 
 bool operator==(const LocalCacheSettings& lhs, const LocalCacheSettings& rhs) {
-  return lhs.kind() == rhs.kind() && lhs.core_settings() == rhs.core_settings();
+  return lhs.kind() == rhs.kind() && lhs.internal() == rhs.internal();
 }
 
 bool operator==(const MemoryCacheSettings& lhs,
@@ -134,7 +121,7 @@ bool operator==(const PersistentCacheSettings& lhs,
 
 bool operator==(const MemoryGarbageCollectorSettings& lhs,
                 const MemoryGarbageCollectorSettings& rhs) {
-  return lhs.core_settings() == rhs.core_settings();
+  return lhs.internal() == rhs.internal();
 }
 
 bool operator==(const MemoryEagerGCSettings& lhs,
diff --git a/firestore/src/common/settings.cc b/firestore/src/common/settings.cc
index ea2ba0f62e..06edbc57d0 100644
--- a/firestore/src/common/settings.cc
+++ b/firestore/src/common/settings.cc
@@ -20,7 +20,6 @@
 #include <ostream>
 #include <sstream>
 
-#include "Firestore/core/src/api/settings.h"
 #include "Firestore/core/src/util/hard_assert.h"
 #include "app/meta/move.h"
 #include "firebase/firestore/local_cache_settings.h"
diff --git a/firestore/src/include/firebase/firestore/local_cache_settings.h b/firestore/src/include/firebase/firestore/local_cache_settings.h
index 5a5b86e04f..b7d4a5eaa8 100644
--- a/firestore/src/include/firebase/firestore/local_cache_settings.h
+++ b/firestore/src/include/firebase/firestore/local_cache_settings.h
@@ -24,15 +24,13 @@
 
 namespace firebase {
 namespace firestore {
-namespace api {
-class LocalCacheSettings;
-class MemoryGargabeCollectorSettings;
-}  // namespace api
 
+class LocalCacheSettingsInternal;
 class PersistentCacheSettingsInternal;
 class MemoryCacheSettingsInternal;
 class MemoryLruGCSettingsInternal;
 class MemoryEagerGCSettingsInternal;
+class MemoryGarbageCollectorSettingsInternal;
 
 /**
  * Abstract class implemented by all supported cache settings.
@@ -42,15 +40,16 @@ class MemoryEagerGCSettingsInternal;
  */
 class LocalCacheSettings {
  public:
+  enum class Kind { kMemory, kPersistent };
+
   virtual ~LocalCacheSettings() = default;
 
+  virtual Kind kind() const = 0;
+
   /** Equality function. */
   friend bool operator==(const LocalCacheSettings& lhs,
                          const LocalCacheSettings& rhs);
 
- protected:
-  enum class Kind { kMemory, kPersistent };
-
  private:
   friend class FirestoreInternal;
   friend class Settings;
@@ -59,8 +58,7 @@ class LocalCacheSettings {
 
   LocalCacheSettings() = default;
 
-  virtual Kind kind() const = 0;
-  virtual const api::LocalCacheSettings& core_settings() const = 0;
+  virtual const LocalCacheSettingsInternal& internal() const = 0;
 };
 
 /**
@@ -114,7 +112,7 @@ class PersistentCacheSettings final : public LocalCacheSettings {
   }
 
   // Get the corresponding settings object from the core sdk.
-  const api::LocalCacheSettings& core_settings() const override;
+  const LocalCacheSettingsInternal& internal() const override;
 
   std::shared_ptr<PersistentCacheSettingsInternal> settings_internal_;
 };
@@ -155,7 +153,7 @@ class MemoryCacheSettings final : public LocalCacheSettings {
     return LocalCacheSettings::Kind::kMemory;
   }
 
-  const api::LocalCacheSettings& core_settings() const override;
+  const LocalCacheSettingsInternal& internal() const override;
 
   std::shared_ptr<MemoryCacheSettingsInternal> settings_internal_;
 };
@@ -178,10 +176,11 @@ class MemoryGarbageCollectorSettings {
   friend class MemoryCacheSettings;
   friend class MemoryEagerGCSettings;
   friend class MemoryLruGCSettings;
+  friend class MemoryCacheSettingsInternal;
 
   MemoryGarbageCollectorSettings() = default;
 
-  virtual const api::MemoryGargabeCollectorSettings& core_settings() const = 0;
+  virtual const MemoryGarbageCollectorSettingsInternal& internal() const = 0;
 };
 
 /**
@@ -211,7 +210,7 @@ class MemoryEagerGCSettings final : public MemoryGarbageCollectorSettings {
  private:
   friend class MemoryCacheSettings;
   MemoryEagerGCSettings();
-  const api::MemoryGargabeCollectorSettings& core_settings() const override;
+  const MemoryGarbageCollectorSettingsInternal& internal() const override;
 
   std::shared_ptr<MemoryEagerGCSettingsInternal> settings_internal_;
 };
@@ -267,7 +266,7 @@ class MemoryLruGCSettings final : public MemoryGarbageCollectorSettings {
   MemoryLruGCSettings();
   MemoryLruGCSettings(const MemoryLruGCSettingsInternal& other);
 
-  const api::MemoryGargabeCollectorSettings& core_settings() const override;
+  const MemoryGarbageCollectorSettingsInternal& internal() const override;
 
   std::shared_ptr<MemoryLruGCSettingsInternal> settings_internal_;
 };
diff --git a/firestore/src/main/firestore_main.cc b/firestore/src/main/firestore_main.cc
index dd49b80c03..d40469e9e6 100644
--- a/firestore/src/main/firestore_main.cc
+++ b/firestore/src/main/firestore_main.cc
@@ -221,7 +221,7 @@ void FirestoreInternal::set_settings(Settings from) {
   // this special logic should go away when legacy cache config is removed.
   if (from.cache_settings_source_ == Settings::CacheSettingsSource::kNew) {
     settings.set_local_cache_settings(
-        from.local_cache_settings().core_settings());
+        from.local_cache_settings().internal().core_settings());
   } else {
     settings.set_persistence_enabled(from.is_persistence_enabled());
     settings.set_cache_size_bytes(from.cache_size_bytes());
diff --git a/firestore/src/main/local_cache_settings_main.h b/firestore/src/main/local_cache_settings_main.h
index 88817f6b8b..7d23ad5068 100644
--- a/firestore/src/main/local_cache_settings_main.h
+++ b/firestore/src/main/local_cache_settings_main.h
@@ -21,27 +21,39 @@
 #include <utility>
 
 #include "Firestore/core/src/api/settings.h"
+#include "firebase/firestore/local_cache_settings.h"
 
 namespace firebase {
 namespace firestore {
 
 class LocalCacheSettingsInternal {
  public:
+  friend bool operator==(const LocalCacheSettingsInternal& lhs,
+                         const LocalCacheSettingsInternal& rhs) {
+    return &lhs == &rhs || lhs.core_settings() == rhs.core_settings();
+  }
+
   virtual const api::LocalCacheSettings& core_settings() const = 0;
 };
 
 class PersistentCacheSettingsInternal final
     : public LocalCacheSettingsInternal {
  public:
-  explicit PersistentCacheSettingsInternal(
-      const api::PersistentCacheSettings& core_settings)
-      : settings_(std::move(core_settings)) {}
+  explicit PersistentCacheSettingsInternal() = default;
 
   friend bool operator==(const PersistentCacheSettingsInternal& lhs,
                          const PersistentCacheSettingsInternal& rhs) {
     return &lhs == &rhs || lhs.settings_ == rhs.settings_;
   }
 
+  PersistentCacheSettingsInternal WithSizeBytes(int64_t size) {
+    PersistentCacheSettingsInternal result;
+    result.set_core_settings(this->core_settings().WithSizeBytes(size));
+    return result;
+  }
+
+  int64_t size_bytes() const { return settings_.size_bytes(); }
+
   const api::PersistentCacheSettings& core_settings() const override {
     return settings_;
   }
@@ -55,15 +67,18 @@ class PersistentCacheSettingsInternal final
 
 class MemoryGarbageCollectorSettingsInternal {
  public:
+  friend bool operator==(const MemoryGarbageCollectorSettingsInternal& lhs,
+                         const MemoryGarbageCollectorSettingsInternal& rhs) {
+    return &lhs == &rhs || lhs.core_settings() == rhs.core_settings();
+  }
+
   virtual const api::MemoryGargabeCollectorSettings& core_settings() const = 0;
 };
 
 class MemoryEagerGCSettingsInternal final
     : public MemoryGarbageCollectorSettingsInternal {
  public:
-  explicit MemoryEagerGCSettingsInternal(
-      const api::MemoryEagerGcSettings& core_settings)
-      : settings_(std::move(core_settings)) {}
+  explicit MemoryEagerGCSettingsInternal() = default;
 
   friend bool operator==(const MemoryEagerGCSettingsInternal& lhs,
                          const MemoryEagerGCSettingsInternal& rhs) {
@@ -84,15 +99,21 @@ class MemoryEagerGCSettingsInternal final
 class MemoryLruGCSettingsInternal final
     : public MemoryGarbageCollectorSettingsInternal {
  public:
-  explicit MemoryLruGCSettingsInternal(
-      const api::MemoryLruGcSettings& core_settings)
-      : settings_(std::move(core_settings)) {}
+  explicit MemoryLruGCSettingsInternal() = default;
 
   friend bool operator==(const MemoryLruGCSettingsInternal& lhs,
                          const MemoryLruGCSettingsInternal& rhs) {
     return &lhs == &rhs || lhs.settings_ == rhs.settings_;
   }
 
+  MemoryLruGCSettingsInternal WithSizeBytes(int64_t size) {
+    MemoryLruGCSettingsInternal result;
+    result.set_core_settings(this->core_settings().WithSizeBytes(size));
+    return result;
+  }
+
+  int64_t size_bytes() const { return settings_.size_bytes(); }
+
   const api::MemoryLruGcSettings& core_settings() const override {
     return settings_;
   }
@@ -106,23 +127,27 @@ class MemoryLruGCSettingsInternal final
 
 class MemoryCacheSettingsInternal final : public LocalCacheSettingsInternal {
  public:
-  explicit MemoryCacheSettingsInternal(
-      const api::MemoryCacheSettings& core_settings)
-      : settings_(std::move(core_settings)) {}
+  explicit MemoryCacheSettingsInternal() = default;
 
   friend bool operator==(const MemoryCacheSettingsInternal& lhs,
                          const MemoryCacheSettingsInternal& rhs) {
     return &lhs == &rhs || lhs.settings_ == rhs.settings_;
   }
 
+  MemoryCacheSettingsInternal WithGarbageCollectorSettings(
+      const MemoryGarbageCollectorSettings& gc_settings) {
+    return MemoryCacheSettingsInternal(
+        api::MemoryCacheSettings().WithMemoryGarbageCollectorSettings(
+            gc_settings.internal().core_settings()));
+  }
+
   const api::MemoryCacheSettings& core_settings() const override {
     return settings_;
   }
-  void set_core_settings(const api::MemoryCacheSettings& settings) {
-    settings_ = settings;
-  }
 
  private:
+  explicit MemoryCacheSettingsInternal(const api::MemoryCacheSettings& settings)
+      : settings_(settings) {}
   api::MemoryCacheSettings settings_;
 };