diff --git a/src/private/Frame.cpp b/src/private/Frame.cpp
index 22b97074..1298b0e2 100644
--- a/src/private/Frame.cpp
+++ b/src/private/Frame.cpp
@@ -168,6 +168,69 @@ void Frame::removeWidget(DockWidgetBase *dw)
     removeWidget_impl(dw);
 }
 
+void Frame::detachTab(DockWidgetBase *dw)
+{
+    if (m_inCtor || m_beingDeleted) return;
+
+    detachTab_impl(dw);
+}
+
+int Frame::indexOfDockWidget(DockWidgetBase *dw)
+{
+    if (m_inCtor || m_beingDeleted) return -1;
+
+    return indexOfDockWidget_impl(dw);
+}
+
+int Frame::currentIndex() const
+{
+    if (m_inCtor || m_beingDeleted) return -1;
+
+    return currentIndex_impl();
+}
+
+void Frame::setCurrentTabIndex(int index)
+{
+    if (m_inCtor || m_beingDeleted) return;
+
+    setCurrentTabIndex_impl(index);
+}
+
+void Frame::setCurrentDockWidget(DockWidgetBase *dw)
+{
+    if (m_inCtor || m_beingDeleted) return;
+
+    setCurrentDockWidget_impl(dw);
+}
+
+void Frame::insertDockWidget(DockWidgetBase *dw, int index)
+{
+    if (m_inCtor || m_beingDeleted) return;
+
+    insertDockWidget_impl(dw, index);
+}
+
+DockWidgetBase *Frame::dockWidgetAt(int index) const
+{
+    if (m_inCtor || m_beingDeleted) return nullptr;
+
+    return dockWidgetAt_impl(index);
+}
+
+DockWidgetBase *Frame::currentDockWidget() const
+{
+    if (m_inCtor || m_beingDeleted) return nullptr;
+
+    return currentDockWidget_impl();
+}
+
+int Frame::dockWidgetCount() const
+{
+    if (m_inCtor || m_beingDeleted) return 0;
+
+    return dockWidgetCount_impl();
+}
+
 void Frame::onDockWidgetCountChanged()
 {
     qCDebug(docking) << "Frame::onDockWidgetCountChanged:" << this << "; widgetCount=" << dockWidgetCount();
diff --git a/src/private/Frame_p.h b/src/private/Frame_p.h
index 2fe5aac7..86f2ba36 100644
--- a/src/private/Frame_p.h
+++ b/src/private/Frame_p.h
@@ -85,31 +85,31 @@ public:
     void removeWidget(DockWidgetBase *);
 
     ///@brief detaches this dock widget
-    virtual void detachTab(DockWidgetBase *) = 0;
+    void detachTab(DockWidgetBase *);
 
     ///@brief returns the index of the specified dock widget
-    virtual int indexOfDockWidget(DockWidgetBase *) = 0;
+    int indexOfDockWidget(DockWidgetBase *);
 
     ///@brief returns the index of the current tab
-    virtual int currentIndex() const = 0;
+    int currentIndex() const;
 
     ///@brief sets the current tab index
-    virtual void setCurrentTabIndex(int index) = 0;
+    void setCurrentTabIndex(int index);
 
     ///@brief Sets the specified dock widget to be the current tab
-    virtual void setCurrentDockWidget(DockWidgetBase *) = 0;
+    void setCurrentDockWidget(DockWidgetBase *);
 
     ///@brief Inserts a dock widget into the specified index
-    virtual void insertDockWidget(DockWidgetBase *, int index) = 0;
+    void insertDockWidget(DockWidgetBase *, int index);
 
     /// @brief Returns the dock widget at @p index
-    virtual DockWidgetBase *dockWidgetAt(int index) const = 0;
+    DockWidgetBase *dockWidgetAt(int index) const;
 
     ///@brief Returns the current dock widget
-    virtual DockWidgetBase *currentDockWidget() const = 0;
+    DockWidgetBase *currentDockWidget() const;
 
     /// @brief returns the number of dock widgets inside the frame
-    virtual int dockWidgetCount() const = 0;
+    int dockWidgetCount() const;
 
     void updateTitleAndIcon();
     void updateTitleBarVisibility();
@@ -250,6 +250,15 @@ protected:
     QSize biggestDockWidgetMaxSize() const;
 
     virtual void removeWidget_impl(DockWidgetBase *) = 0;
+    virtual void detachTab_impl(DockWidgetBase *) = 0;
+    virtual int indexOfDockWidget_impl(DockWidgetBase *) = 0;
+    virtual int currentIndex_impl() const = 0;
+    virtual void setCurrentTabIndex_impl(int index) = 0;
+    virtual void setCurrentDockWidget_impl(DockWidgetBase *) = 0;
+    virtual void insertDockWidget_impl(DockWidgetBase *, int index) = 0;
+    virtual DockWidgetBase *dockWidgetAt_impl(int index) const = 0;
+    virtual DockWidgetBase *currentDockWidget_impl() const = 0;
+    virtual int dockWidgetCount_impl() const = 0;
 
 private:
     Q_DISABLE_COPY(Frame)
diff --git a/src/private/widgets/FrameWidget.cpp b/src/private/widgets/FrameWidget.cpp
index ee6e9ae1..6e4eef68 100644
--- a/src/private/widgets/FrameWidget.cpp
+++ b/src/private/widgets/FrameWidget.cpp
@@ -88,27 +88,27 @@ QSize FrameWidget::maxSizeHint() const
     return waste + biggestDockWidgetMaxSize();
 }
 
-void FrameWidget::detachTab(DockWidgetBase *dw)
+void FrameWidget::detachTab_impl(DockWidgetBase *dw)
 {
     m_tabWidget->detachTab(dw);
 }
 
-int FrameWidget::indexOfDockWidget(DockWidgetBase *dw)
+int FrameWidget::indexOfDockWidget_impl(DockWidgetBase *dw)
 {
     return m_tabWidget->indexOfDockWidget(dw);
 }
 
-void FrameWidget::setCurrentDockWidget(DockWidgetBase *dw)
+void FrameWidget::setCurrentDockWidget_impl(DockWidgetBase *dw)
 {
     m_tabWidget->setCurrentDockWidget(dw);
 }
 
-int FrameWidget::currentIndex() const
+int FrameWidget::currentIndex_impl() const
 {
     return m_tabWidget->currentIndex();
 }
 
-void FrameWidget::insertDockWidget(DockWidgetBase *dw, int index)
+void FrameWidget::insertDockWidget_impl(DockWidgetBase *dw, int index)
 {
     m_tabWidget->insertDockWidget(dw, index);
 }
@@ -118,17 +118,17 @@ void FrameWidget::removeWidget_impl(DockWidgetBase *dw)
     m_tabWidget->removeDockWidget(dw);
 }
 
-void FrameWidget::setCurrentTabIndex(int index)
+void FrameWidget::setCurrentTabIndex_impl(int index)
 {
     m_tabWidget->setCurrentDockWidget(index);
 }
 
-DockWidgetBase *FrameWidget::currentDockWidget() const
+DockWidgetBase *FrameWidget::currentDockWidget_impl() const
 {
     return m_tabWidget->dockwidgetAt(m_tabWidget->currentIndex());
 }
 
-DockWidgetBase *FrameWidget::dockWidgetAt(int index) const
+DockWidgetBase *FrameWidget::dockWidgetAt_impl(int index) const
 {
     return qobject_cast<DockWidgetBase *>(m_tabWidget->dockwidgetAt(index));
 }
@@ -144,7 +144,7 @@ TabWidget *FrameWidget::tabWidget() const
     return m_tabWidget;
 }
 
-int FrameWidget::dockWidgetCount() const
+int FrameWidget::dockWidgetCount_impl() const
 {
     return m_tabWidget->numDockWidgets();
 }
diff --git a/src/private/widgets/FrameWidget_p.h b/src/private/widgets/FrameWidget_p.h
index f867fb3d..d239cf51 100644
--- a/src/private/widgets/FrameWidget_p.h
+++ b/src/private/widgets/FrameWidget_p.h
@@ -47,16 +47,16 @@ public:
 protected:
     void paintEvent(QPaintEvent *) override;
     QSize maxSizeHint() const override;
-    void detachTab(DockWidgetBase *) override;
-    int indexOfDockWidget(DockWidgetBase *) override;
-    void setCurrentDockWidget(DockWidgetBase *) override;
-    int currentIndex() const override;
-    void insertDockWidget(DockWidgetBase *, int index) override;
+    void detachTab_impl(DockWidgetBase *) override;
+    int indexOfDockWidget_impl(DockWidgetBase *) override;
+    void setCurrentDockWidget_impl(DockWidgetBase *) override;
+    int currentIndex_impl() const override;
+    void insertDockWidget_impl(DockWidgetBase *, int index) override;
     void removeWidget_impl(DockWidgetBase *) override;
-    void setCurrentTabIndex(int) override;
-    DockWidgetBase *currentDockWidget() const override;
-    DockWidgetBase *dockWidgetAt(int index) const override;
-    int dockWidgetCount() const override;
+    void setCurrentTabIndex_impl(int) override;
+    DockWidgetBase *currentDockWidget_impl() const override;
+    DockWidgetBase *dockWidgetAt_impl(int index) const override;
+    int dockWidgetCount_impl() const override;
 private:
     friend class TestDocks;
     TabWidget *const m_tabWidget;