diff --git a/src/plugins/scxmleditor/CMakeLists.txt b/src/plugins/scxmleditor/CMakeLists.txt
index 85a1c7fc706..de5fe6327af 100644
--- a/src/plugins/scxmleditor/CMakeLists.txt
+++ b/src/plugins/scxmleditor/CMakeLists.txt
@@ -89,6 +89,5 @@ add_qtc_plugin(ScxmlEditor
     scxmleditor.cpp scxmleditor.h
     scxmleditordocument.cpp scxmleditordocument.h
     scxmleditorplugin.cpp
-    scxmleditorstack.cpp scxmleditorstack.h
     scxmltexteditor.cpp scxmltexteditor.h
 )
diff --git a/src/plugins/scxmleditor/scxmleditor.cpp b/src/plugins/scxmleditor/scxmleditor.cpp
index f28965ff28a..9a2320246bd 100644
--- a/src/plugins/scxmleditor/scxmleditor.cpp
+++ b/src/plugins/scxmleditor/scxmleditor.cpp
@@ -4,7 +4,6 @@
 #include "mainwidget.h"
 #include "scxmleditorconstants.h"
 #include "scxmleditordocument.h"
-#include "scxmleditorstack.h"
 #include "scxmleditortr.h"
 #include "scxmltexteditor.h"
 
@@ -32,9 +31,10 @@
 #include <utils/utilsicons.h>
 
 #include <QGuiApplication>
-#include <QVBoxLayout>
+#include <QStackedWidget>
 #include <QToolBar>
 #include <QUndoGroup>
+#include <QVBoxLayout>
 
 using namespace Core;
 using namespace ScxmlEditor::Common;
@@ -43,6 +43,68 @@ using namespace Utils;
 
 namespace ScxmlEditor::Internal {
 
+class ScxmlEditorStack final : public QStackedWidget
+{
+public:
+    ScxmlEditorStack() { setObjectName("ScxmlEditorStack"); }
+
+    void add(ScxmlTextEditor *editor, QWidget *widget)
+    {
+        connect(Core::ModeManager::instance(), &Core::ModeManager::currentModeAboutToChange,
+                this, &ScxmlEditorStack::modeAboutToChange);
+
+        m_editors.append(editor);
+        addWidget(widget);
+        connect(editor, &ScxmlTextEditor::destroyed,
+                this, &ScxmlEditorStack::removeScxmlTextEditor);
+    }
+
+    QWidget *widgetForEditor(ScxmlTextEditor *xmlEditor)
+    {
+        const int i = m_editors.indexOf(xmlEditor);
+        QTC_ASSERT(i >= 0, return nullptr);
+
+        return widget(i);
+    }
+
+    void removeScxmlTextEditor(QObject *xmlEditor)
+    {
+        const int i = m_editors.indexOf(xmlEditor);
+        QTC_ASSERT(i >= 0, return);
+
+        QWidget *widget = this->widget(i);
+        if (widget) {
+            removeWidget(widget);
+            widget->deleteLater();
+        }
+        m_editors.removeAt(i);
+    }
+
+    bool setVisibleEditor(Core::IEditor *xmlEditor)
+    {
+        const int i = m_editors.indexOf(xmlEditor);
+        QTC_ASSERT(i >= 0, return false);
+
+        if (i != currentIndex())
+            setCurrentIndex(i);
+
+        return true;
+    }
+
+private:
+    void modeAboutToChange(Utils::Id m)
+    {
+        // Sync the editor when entering edit mode
+        if (m == Core::Constants::MODE_EDIT) {
+            for (auto editor: std::as_const(m_editors))
+                if (auto document = qobject_cast<ScxmlEditorDocument*>(editor->textDocument()))
+                    document->syncXmlFromDesignWidget();
+        }
+    }
+
+    QList<ScxmlTextEditor*> m_editors;
+};
+
 class ScxmlTextEditorWidget : public TextEditor::TextEditorWidget
 {
 public:
diff --git a/src/plugins/scxmleditor/scxmleditor.qbs b/src/plugins/scxmleditor/scxmleditor.qbs
index b583163579d..06a6773124a 100644
--- a/src/plugins/scxmleditor/scxmleditor.qbs
+++ b/src/plugins/scxmleditor/scxmleditor.qbs
@@ -24,7 +24,6 @@ QtcPlugin {
         "scxmleditor.cpp", "scxmleditor.h",
         "scxmleditordocument.cpp", "scxmleditordocument.h",
         "scxmleditorplugin.cpp",
-        "scxmleditorstack.cpp", "scxmleditorstack.h",
         "scxmltexteditor.cpp", "scxmltexteditor.h",
     ]
 
diff --git a/src/plugins/scxmleditor/scxmleditorstack.cpp b/src/plugins/scxmleditor/scxmleditorstack.cpp
deleted file mode 100644
index d3a739133f3..00000000000
--- a/src/plugins/scxmleditor/scxmleditorstack.cpp
+++ /dev/null
@@ -1,74 +0,0 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
-
-#include "scxmleditorstack.h"
-#include "scxmleditordocument.h"
-#include "scxmltexteditor.h"
-
-#include <coreplugin/coreconstants.h>
-#include <coreplugin/imode.h>
-#include <coreplugin/modemanager.h>
-
-#include <utils/qtcassert.h>
-
-using namespace ScxmlEditor;
-using namespace ScxmlEditor::Internal;
-
-ScxmlEditorStack::ScxmlEditorStack(QWidget *parent)
-    : QStackedWidget(parent)
-{
-    setObjectName("ScxmlEditorStack");
-}
-
-void ScxmlEditorStack::add(ScxmlTextEditor *editor, QWidget *w)
-{
-    connect(Core::ModeManager::instance(), &Core::ModeManager::currentModeAboutToChange,
-            this, &ScxmlEditorStack::modeAboutToChange);
-
-    m_editors.append(editor);
-    addWidget(w);
-    connect(editor, &ScxmlTextEditor::destroyed,
-            this, &ScxmlEditorStack::removeScxmlTextEditor);
-}
-
-void ScxmlEditorStack::removeScxmlTextEditor(QObject *xmlEditor)
-{
-    const int i = m_editors.indexOf(static_cast<ScxmlTextEditor*>(xmlEditor));
-    QTC_ASSERT(i >= 0, return);
-
-    QWidget *widget = this->widget(i);
-    if (widget) {
-        removeWidget(widget);
-        widget->deleteLater();
-    }
-    m_editors.removeAt(i);
-}
-
-bool ScxmlEditorStack::setVisibleEditor(Core::IEditor *xmlEditor)
-{
-    const int i = m_editors.indexOf(static_cast<ScxmlTextEditor*>(xmlEditor));
-    QTC_ASSERT(i >= 0, return false);
-
-    if (i != currentIndex())
-        setCurrentIndex(i);
-
-    return true;
-}
-
-QWidget *ScxmlEditorStack::widgetForEditor(ScxmlTextEditor *xmlEditor)
-{
-    const int i = m_editors.indexOf(xmlEditor);
-    QTC_ASSERT(i >= 0, return nullptr);
-
-    return widget(i);
-}
-
-void ScxmlEditorStack::modeAboutToChange(Utils::Id m)
-{
-    // Sync the editor when entering edit mode
-    if (m == Core::Constants::MODE_EDIT) {
-        for (auto editor: std::as_const(m_editors))
-            if (auto document = qobject_cast<ScxmlEditorDocument*>(editor->textDocument()))
-                document->syncXmlFromDesignWidget();
-    }
-}
diff --git a/src/plugins/scxmleditor/scxmleditorstack.h b/src/plugins/scxmleditor/scxmleditorstack.h
deleted file mode 100644
index ecad2324ecc..00000000000
--- a/src/plugins/scxmleditor/scxmleditorstack.h
+++ /dev/null
@@ -1,39 +0,0 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
-
-#pragma once
-
-#include <utils/id.h>
-
-#include <QStackedWidget>
-
-namespace Core {
-class IEditor;
-class IMode;
-}
-
-namespace ScxmlEditor {
-
-class ScxmlTextEditor;
-
-namespace Internal {
-
-class ScxmlEditorStack : public QStackedWidget {
-    Q_OBJECT
-
-public:
-    ScxmlEditorStack(QWidget *parent = nullptr);
-
-    void add(ScxmlTextEditor *editor, QWidget *widget);
-    QWidget *widgetForEditor(ScxmlTextEditor *editor);
-    void removeScxmlTextEditor(QObject*);
-    bool setVisibleEditor(Core::IEditor *xmlEditor);
-
-private:
-    void modeAboutToChange(Utils::Id m);
-
-    QVector<ScxmlTextEditor*> m_editors;
-};
-
-} // namespace Internal
-} // namespace ScxmlEditor