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-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the documentation of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:FDL$
-** 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 Free Documentation License Usage
-** Alternatively, this file may be used under the terms of the GNU Free
-** Documentation License version 1.3 as published by the Free Software
-** Foundation and appearing in the file included in the packaging of
-** this file. Please review the following information to ensure
-** the GNU Free Documentation License version 1.3 requirements
-** will be met: https://www.gnu.org/licenses/fdl-1.3.html.
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-/*!
-    \example statemachine/factorial
-    \title Factorial States Example
-
-    \brief The Factorial States example shows how to use \l{The State Machine
-    Framework} to calculate the factorial of an integer.
-
-    The statechart for calculating the factorial looks as follows:
-
-    \image factorial-example.png
-    \omit
-    \caption This is a caption
-    \endomit
-
-    In other words, the state machine calculates the factorial of 6 and prints
-    the result.
-
-    \snippet statemachine/factorial/main.cpp 0
-
-    The Factorial class is used to hold the data of the computation, \c x and
-    \c fac. It also provides a signal that's emitted whenever the value of \c
-    x changes.
-
-    \snippet statemachine/factorial/main.cpp 1
-
-    The FactorialLoopTransition class implements the guard (\c x > 1) and
-    calculations (\c fac = \c x * \c fac; \c x = \c x - 1) of the factorial
-    loop.
-
-    \snippet statemachine/factorial/main.cpp 2
-
-    The FactorialDoneTransition class implements the guard (\c x <= 1) that
-    terminates the factorial computation. It also prints the final result to
-    standard output.
-
-    \snippet statemachine/factorial/main.cpp 3
-
-    The application's main() function first creates the application object, a
-    Factorial object and a state machine.
-
-    \snippet statemachine/factorial/main.cpp 4
-
-    The \c compute state is created, and the initial values of \c x and \c fac
-    are defined. A FactorialLoopTransition object is created and added to the
-    state.
-
-    \snippet statemachine/factorial/main.cpp 5
-
-    A final state, \c done, is created, and a FactorialDoneTransition object
-    is created with \c done as its target state. The transition is then added
-    to the \c compute state.
-
-    \snippet statemachine/factorial/main.cpp 6
-
-    The machine's initial state is set to be the \c compute state. We connect
-    the QStateMachine::finished() signal to the QCoreApplication::quit() slot,
-    so the application will quit when the state machine's work is
-    done. Finally, the state machine is started, and the application's event
-    loop is entered.
-
- */