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diff --git a/src/qmlcompiler/qqmljsfunctioninitializer_p.h b/src/qmlcompiler/qqmljsfunctioninitializer_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the tools applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QQMLJSFUNCTIONINITIALIAZER_P_H
+#define QQMLJSFUNCTIONINITIALIAZER_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 <private/qqmljscompilepass_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class QQmlJSFunctionInitializer
+{
+    Q_DISABLE_COPY_MOVE(QQmlJSFunctionInitializer)
+public:
+    QQmlJSFunctionInitializer(
+            const QQmlJSTypeResolver *typeResolver, const QmlIR::Object *object,
+            const QmlIR::Object *scope)
+        : m_typeResolver(typeResolver)
+        , m_currentObject(object)
+        , m_scopeType(typeResolver->scopeForLocation(scope->location))
+        , m_objectType(typeResolver->scopeForLocation(object->location))
+    {}
+
+    QQmlJSCompilePass::Function run(
+            const QV4::Compiler::Context *context,
+            const QString &propertyName, const QmlIR::Binding &irBinding,
+            QQmlJS::DiagnosticMessage *error);
+    QQmlJSCompilePass::Function run(
+            const QV4::Compiler::Context *context,
+            const QString &functionName, const QmlIR::Function &irFunction,
+            QQmlJS::DiagnosticMessage *error);
+
+private:
+    void populateSignature(
+            const QV4::Compiler::Context *context, QQmlJS::AST::FunctionExpression *ast,
+            QQmlJSCompilePass::Function *function, QQmlJS::DiagnosticMessage *error);
+
+    const QQmlJSTypeResolver *m_typeResolver = nullptr;
+    const QmlIR::Object *m_currentObject = nullptr;
+    const QQmlJSScope::ConstPtr m_scopeType;
+    const QQmlJSScope::ConstPtr m_objectType;
+};
+
+QT_END_NAMESPACE
+
+#endif // QQMLJSFUNCTIONINITIALIZER_P_H