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diff --git a/src/plugins/qmldesigner/designercore/instances/connectionmanager.h b/src/plugins/qmldesigner/designercore/instances/connectionmanager.h
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+++ b/src/plugins/qmldesigner/designercore/instances/connectionmanager.h
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+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include "baseconnectionmanager.h"
+#include "nodeinstanceserverinterface.h"
+
+#include <QElapsedTimer>
+#include <QFile>
+#include <QProcess>
+
+QT_BEGIN_NAMESPACE
+class QLocalServer;
+class QLocalSocket;
+QT_END_NAMESPACE
+
+namespace QmlDesigner {
+
+class QMLDESIGNERCORE_EXPORT ConnectionManager : public BaseConnectionManager
+{
+    Q_OBJECT
+
+public:
+    ConnectionManager();
+    ~ConnectionManager() override;
+    enum PuppetStreamType { FirstPuppetStream, SecondPuppetStream, ThirdPuppetStream };
+
+    void setUp(NodeInstanceServerProxy *nodeInstanceServerProxy,
+               const QString &qrcMappingString,
+               ProjectExplorer::Target *target) override;
+    void shutDown() override;
+
+    void writeCommand(const QVariant &command) override;
+
+signals:
+    void processCrashed();
+
+protected:
+    using BaseConnectionManager::processFinished;
+    void processFinished(int exitCode, QProcess::ExitStatus exitStatus) override;
+
+private:
+    void printProcessOutput(QProcess *process, const QString &connectionName);
+    void closeSocketsAndKillProcesses();
+
+protected:
+    std::vector<Connection> m_connections;
+    quint32 m_writeCommandCounter = 0;
+
+private:
+    std::unique_ptr<QLocalServer> m_localServer;
+};
+
+} // namespace QmlDesigner