diff --git a/apps/sequence/graph/graph_controller.cpp b/apps/sequence/graph/graph_controller.cpp
index d16d68e9d..5db89d5a0 100644
--- a/apps/sequence/graph/graph_controller.cpp
+++ b/apps/sequence/graph/graph_controller.cpp
@@ -25,18 +25,6 @@ I18n::Message GraphController::emptyMessage() {
   return I18n::Message::NoActivatedSequence;
 }
 
-TermSumController * GraphController::termSumController() {
-  return &m_termSumController;
-}
-
-int GraphController::numberOfCurves() const {
-  return m_sequenceStore->numberOfModels();
-}
-
-BannerView * GraphController::bannerView() {
-  return &m_bannerView;
-}
-
 bool GraphController::handleEnter() {
   m_termSumController.setFunction(m_sequenceStore->activeFunctionAtIndex(indexFunctionSelectedByCursor()));
   return FunctionGraphController::handleEnter();
@@ -69,20 +57,4 @@ double GraphController::defaultCursorAbscissa() {
   return std::round(Shared::FunctionGraphController::defaultCursorAbscissa());
 }
 
-CurveViewRange * GraphController::interactiveCurveViewRange() {
-  return m_graphRange;
-}
-
-SequenceStore * GraphController::functionStore() const {
-  return m_sequenceStore;
-}
-
-GraphView * GraphController::functionGraphView() {
-  return &m_view;
-}
-
-CurveParameterController * GraphController::curveParameterController() {
-  return &m_curveParameterController;
-}
-
 }
diff --git a/apps/sequence/graph/graph_controller.h b/apps/sequence/graph/graph_controller.h
index 40e7f70d8..b90942074 100644
--- a/apps/sequence/graph/graph_controller.h
+++ b/apps/sequence/graph/graph_controller.h
@@ -12,25 +12,25 @@
 
 namespace Sequence {
 
-class GraphController : public Shared::FunctionGraphController {
+class GraphController final : public Shared::FunctionGraphController {
 public:
   GraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, SequenceStore * sequenceStore, CurveViewRange * graphRange, Shared::CurveViewCursor * cursor, int * indexFunctionSelectedByCursor, uint32_t * modelVersion, uint32_t * rangeVersion, Poincare::Preferences::AngleUnit * angleUnitVersion, ButtonRowController * header);
   I18n::Message emptyMessage() override;
-  TermSumController * termSumController();
+  TermSumController * termSumController() { return &m_termSumController; }
 protected:
-  int numberOfCurves() const override;
+  int numberOfCurves() const override { return m_sequenceStore->numberOfModels(); }
 private:
-  BannerView * bannerView() override;
+  BannerView * bannerView() override { return &m_bannerView; }
   bool handleEnter() override;
   bool moveCursorHorizontally(int direction) override;
   double defaultCursorAbscissa() override;
-  CurveViewRange * interactiveCurveViewRange() override;
-  SequenceStore * functionStore() const override;
-  GraphView * functionGraphView() override;
+  CurveViewRange * interactiveCurveViewRange() override { return m_graphRange; }
+  SequenceStore * functionStore() const override { return m_sequenceStore; }
+  GraphView * functionGraphView() override { return &m_view; }
   View * cursorView() override {
     return &m_cursorView;
   }
-  CurveParameterController * curveParameterController() override;
+  CurveParameterController * curveParameterController() override { return &m_curveParameterController; }
   Shared::CursorView m_cursorView;
   BannerView m_bannerView;
   GraphView m_view;