Add missing private API warnings

Change-Id: I62ee3648689e1858c7b17f9c1e847348c8ff4d21
Reviewed-by: Jari-Pekka Nurmi <jpnurmi@theqtcompany.com>

src/calendar/qquickabstractcalendarview_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTCALENDARVIEW_P_H
 #define QQUICKABSTRACTCALENDARVIEW_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickCalendar/private/qtquickcalendarglobal_p.h>
 #include <QtQuickControls/private/qquickabstractcontainer_p.h>
 

src/calendar/qquickabstractdayofweekrow_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTDAYOFWEEKROW_P_H
 #define QQUICKABSTRACTDAYOFWEEKROW_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickCalendar/private/qtquickcalendarglobal_p.h>
 #include <QtQuickControls/private/qquickabstractcontainer_p.h>
 

src/calendar/qquickabstractweeknumbercolumn_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTWEEKNUMBERCOLUMN_P_H
 #define QQUICKABSTRACTWEEKNUMBERCOLUMN_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickCalendar/private/qtquickcalendarglobal_p.h>
 #include <QtQuickControls/private/qquickabstractcontainer_p.h>
 

src/calendar/qquickcalendarmodel_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKCALENDARMODEL_P_H
 #define QQUICKCALENDARMODEL_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtCore/qabstractitemmodel.h>
 #include <QtCore/qdatetime.h>
 #include <QtQml/qqmlparserstatus.h>

src/calendar/qquickdayofweekmodel_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKDAYOFWEEKMODEL_P_H
 #define QQUICKDAYOFWEEKMODEL_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtCore/qabstractitemmodel.h>
 #include <QtCore/qlocale.h>
 #include <QtQuickCalendar/private/qtquickcalendarglobal_p.h>

src/calendar/qquickmonthmodel_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKMONTHMODEL_P_H
 #define QQUICKMONTHMODEL_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtCore/qabstractitemmodel.h>
 #include <QtCore/qdatetime.h>
 #include <QtCore/qlocale.h>

src/calendar/qquickweeknumbermodel_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKWEEKNUMBERMODEL_P_H
 #define QQUICKWEEKNUMBERMODEL_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtCore/qabstractitemmodel.h>
 #include <QtCore/qlocale.h>
 #include <QtQuickCalendar/private/qtquickcalendarglobal_p.h>

src/calendar/qtquickcalendarglobal_p.h

@@ -37,6 +37,17 @@
 #ifndef QTQUICKCALENDARGLOBAL_P_H
 #define QTQUICKCALENDARGLOBAL_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtCore/qglobal.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstractapplicationwindow_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTAPPLICATIONWINDOW_P_H
 #define QQUICKABSTRACTAPPLICATIONWINDOW_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuick/private/qquickwindowmodule_p.h>
 #include <QtQuickControls/private/qtquickcontrolsglobal_p.h>
 

src/controls/qquickabstractbusyindicator_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTBUSYINDICATOR_P_H
 #define QQUICKABSTRACTBUSYINDICATOR_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickcontrol_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstractbutton_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTBUTTON_P_H
 #define QQUICKABSTRACTBUTTON_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickcontrol_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstractbutton_p_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTBUTTON_P_P_H
 #define QQUICKABSTRACTBUTTON_P_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickcontrol_p_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstractcheckable_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTCHECKABLE_P_H
 #define QQUICKABSTRACTCHECKABLE_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickabstractbutton_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstractcheckable_p_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTCHECKABLE_P_P_H
 #define QQUICKABSTRACTCHECKABLE_P_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickabstractbutton_p_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstractcheckbox_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTCHECKBOX_P_H
 #define QQUICKABSTRACTCHECKBOX_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickabstractcheckable_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstractcontainer_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTCONTAINER_P_H
 #define QQUICKABSTRACTCONTAINER_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickcontrol_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstractcontainer_p_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTCONTAINER_P_P_H
 #define QQUICKABSTRACTCONTAINER_P_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickcontrol_p_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstractframe_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTFRAME_P_H
 #define QQUICKABSTRACTFRAME_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickabstractcontainer_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstractgroupbox_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTGROUPBOX_P_H
 #define QQUICKABSTRACTGROUPBOX_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickabstractcontainer_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstractpageindicator_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTPAGEINDICATOR_P_H
 #define QQUICKABSTRACTPAGEINDICATOR_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickabstractcontainer_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstractprogressbar_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTPROGRESSBAR_P_H
 #define QQUICKABSTRACTPROGRESSBAR_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickcontrol_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstractradiobutton_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTRADIOBUTTON_P_H
 #define QQUICKABSTRACTRADIOBUTTON_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickabstractcheckable_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstractscrollbar_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTSCROLLBAR_P_H
 #define QQUICKABSTRACTSCROLLBAR_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickcontrol_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstractscrollindicator_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTSCROLLINDICATOR_P_H
 #define QQUICKABSTRACTSCROLLINDICATOR_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickcontrol_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstractslider_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTSLIDER_P_H
 #define QQUICKABSTRACTSLIDER_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickcontrol_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstractspinbox_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTSPINBOX_P_H
 #define QQUICKABSTRACTSPINBOX_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickcontrol_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstractstackview_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTSTACKVIEW_P_H
 #define QQUICKABSTRACTSTACKVIEW_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickabstractcontainer_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstractswitch_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTSWITCH_P_H
 #define QQUICKABSTRACTSWITCH_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickabstractcheckable_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstracttabbar_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTTABBAR_P_H
 #define QQUICKABSTRACTTABBAR_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickabstractcontainer_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstracttabbutton_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTTABBUTTON_P_H
 #define QQUICKABSTRACTTABBUTTON_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickabstractcheckable_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstracttabview_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTTABVIEW_P_H
 #define QQUICKABSTRACTTABVIEW_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickabstractcontainer_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstracttextarea_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTTEXTAREA_P_H
 #define QQUICKABSTRACTTEXTAREA_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickcontrol_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstracttextfield_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTTEXTFIELD_P_H
 #define QQUICKABSTRACTTEXTFIELD_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickcontrol_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstracttogglebutton_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTTOGGLEBUTTON_P_H
 #define QQUICKABSTRACTTOGGLEBUTTON_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickabstractswitch_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickabstracttoolbar_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTTOOLBAR_P_H
 #define QQUICKABSTRACTTOOLBAR_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickControls/private/qquickabstractcontainer_p.h>
 
 QT_BEGIN_NAMESPACE

src/controls/qquickcontrol_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKCONTROL_P_H
 #define QQUICKCONTROL_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuick/qquickitem.h>
 #include <QtQuickControls/private/qtquickcontrolsglobal_p.h>
 

src/controls/qquickcontrol_p_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKCONTROL_P_P_H
 #define QQUICKCONTROL_P_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuick/private/qquickitem_p.h>
 #include <QtQuickControls/private/qquickstyle_p.h>
 #include <QtQuickControls/private/qquickpadding_p.h>

src/controls/qquickexclusivegroup_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKEXCLUSIVEGROUP_P_H
 #define QQUICKEXCLUSIVEGROUP_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtCore/qobject.h>
 #include <QtQuickControls/private/qtquickcontrolsglobal_p.h>
 #include <QtQml/qqml.h>

src/controls/qquickpadding_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKPADDING_P_H
 #define QQUICKPADDING_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtCore/qobject.h>
 #include <QtQuickControls/private/qtquickcontrolsglobal_p.h>
 

src/controls/qquickstyle_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKSTYLE_P_H
 #define QQUICKSTYLE_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtCore/qobject.h>
 #include <QtGui/qcolor.h>
 #include <QtQuickControls/private/qtquickcontrolsglobal_p.h>

src/controls/qtquickcontrolsglobal_p.h

@@ -37,6 +37,17 @@
 #ifndef QTQUICKCONTROLSGLOBAL_P_H
 #define QTQUICKCONTROLSGLOBAL_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtCore/qglobal.h>
 
 QT_BEGIN_NAMESPACE

src/extras/qquickabstractdrawer_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTDRAWER_P_H
 #define QQUICKABSTRACTDRAWER_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickExtras/private/qtquickextrasglobal_p.h>
 #include <QtQuickControls/private/qquickcontrol_p.h>
 

src/extras/qquickabstractsplitview_p.h

@@ -37,6 +37,17 @@
 #ifndef QQUICKABSTRACTSPLITVIEW_P_H
 #define QQUICKABSTRACTSPLITVIEW_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtQuickExtras/private/qtquickextrasglobal_p.h>
 #include <QtQuickControls/private/qquickabstractcontainer_p.h>
 

src/extras/qtquickextrasglobal_p.h

@@ -37,6 +37,17 @@
 #ifndef QTQUICKEXTRASGLOBAL_P_H
 #define QTQUICKEXTRASGLOBAL_P_H
 
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
 #include <QtCore/qglobal.h>
 
 QT_BEGIN_NAMESPACE