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diff --git a/examples/samplebinding/truck.cpp b/examples/samplebinding/truck.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2018 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the Qt for Python examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <iostream>
+#include <random>
+
+#include "truck.h"
+
+Truck::Truck(bool leaveOnDestruction) : m_leaveOnDestruction(leaveOnDestruction) {}
+
+Truck::Truck(const Truck &other)
+{
+    for (size_t i = 0; i < other.m_flavors.size(); ++i) {
+        addIcecreamFlavor(other.m_flavors[i]->clone());
+    }
+}
+
+Truck &Truck::operator=(const Truck &other)
+{
+    if (this != &other) {
+        clearFlavors();
+        for (size_t i = 0; i < other.m_flavors.size(); ++i) {
+            addIcecreamFlavor(other.m_flavors[i]->clone());
+        }
+    }
+    return *this;
+}
+
+Truck::~Truck()
+{
+    if (m_leaveOnDestruction)
+        leave();
+    clearFlavors();
+}
+
+void Truck::addIcecreamFlavor(Icecream *icecream)
+{
+    m_flavors.push_back(icecream);
+}
+
+void Truck::printAvailableFlavors() const
+{
+    std::cout << "It sells the following flavors: \n";
+    for (size_t i = 0; i < m_flavors.size(); ++ i) {
+        std::cout << "  * "  << m_flavors[i]->getFlavor() << '\n';
+    }
+    std::cout << '\n';
+}
+
+void Truck::arrive() const
+{
+    std::cout << m_arrivalMessage;
+}
+
+void Truck::leave() const
+{
+    std::cout << "The truck left the neighborhood.\n";
+}
+
+void Truck::setLeaveOnDestruction(bool value)
+{
+    m_leaveOnDestruction = value;
+}
+
+void Truck::setArrivalMessage(const std::string &message)
+{
+    m_arrivalMessage = message;
+}
+
+bool Truck::deliver() const
+{
+    std::random_device rd;
+    std::mt19937 mt(rd());
+    std::uniform_int_distribution<int> dist(1, 2);
+
+    std::cout << "The truck started delivering icecream to all the kids in the neighborhood.\n";
+    bool result = false;
+
+    if (dist(mt) == 2)
+        result = true;
+
+    return result;
+}
+
+void Truck::clearFlavors()
+{
+    for (size_t i = 0; i < m_flavors.size(); ++i) {
+        delete m_flavors[i];
+    }
+    m_flavors.clear();
+}