diff --git a/src/plugins/cppeditor/cpptoolstestcase.cpp b/src/plugins/cppeditor/cpptoolstestcase.cpp
index 420e551847d..37b5d855d0a 100644
--- a/src/plugins/cppeditor/cpptoolstestcase.cpp
+++ b/src/plugins/cppeditor/cpptoolstestcase.cpp
@@ -391,8 +391,7 @@ ProjectOpenerAndCloser::~ProjectOpenerAndCloser()
 ProjectInfo::ConstPtr ProjectOpenerAndCloser::open(const FilePath &projectFile,
         bool configureAsExampleProject, Kit *kit)
 {
-    ProjectExplorerPlugin::OpenProjectResult result =
-            ProjectExplorerPlugin::openProject(projectFile);
+    OpenProjectResult result = ProjectExplorerPlugin::openProject(projectFile);
     if (!result) {
         qWarning() << result.errorMessage() << result.alreadyOpen();
         return {};
diff --git a/src/plugins/projectexplorer/customwizard/customwizard.cpp b/src/plugins/projectexplorer/customwizard/customwizard.cpp
index 9d060624386..c18926cbfc9 100644
--- a/src/plugins/projectexplorer/customwizard/customwizard.cpp
+++ b/src/plugins/projectexplorer/customwizard/customwizard.cpp
@@ -529,8 +529,7 @@ bool CustomProjectWizard::postGenerateOpen(const GeneratedFiles &l, QString *err
     // Post-Generate: Open the project and the editors as desired
     for (const GeneratedFile &file : l) {
         if (file.attributes() & GeneratedFile::OpenProjectAttribute) {
-            ProjectExplorerPlugin::OpenProjectResult result
-                    = ProjectExplorerPlugin::openProject(file.filePath());
+            OpenProjectResult result = ProjectExplorerPlugin::openProject(file.filePath());
             if (!result) {
                 if (errorMessage)
                     *errorMessage = result.errorMessage();
diff --git a/src/plugins/projectexplorer/jsonwizard/jsonwizard.cpp b/src/plugins/projectexplorer/jsonwizard/jsonwizard.cpp
index 17fc1e736c0..83b8b81bef6 100644
--- a/src/plugins/projectexplorer/jsonwizard/jsonwizard.cpp
+++ b/src/plugins/projectexplorer/jsonwizard/jsonwizard.cpp
@@ -445,8 +445,7 @@ void JsonWizard::openFiles(const JsonWizard::GeneratorFiles &files)
             break;
         }
         if (file.attributes() & Core::GeneratedFile::OpenProjectAttribute) {
-            ProjectExplorerPlugin::OpenProjectResult result
-                    = ProjectExplorerPlugin::openProject(file.filePath());
+            OpenProjectResult result = ProjectExplorerPlugin::openProject(file.filePath());
             if (!result) {
                 errorMessage = result.errorMessage();
                 if (errorMessage.isEmpty()) {
diff --git a/src/plugins/projectexplorer/projectexplorer.cpp b/src/plugins/projectexplorer/projectexplorer.cpp
index a3076aa2789..11e0fbb0f9f 100644
--- a/src/plugins/projectexplorer/projectexplorer.cpp
+++ b/src/plugins/projectexplorer/projectexplorer.cpp
@@ -1970,7 +1970,7 @@ void ProjectExplorerPluginPrivate::loadAction()
     if (filePath.isEmpty())
         return;
 
-    ProjectExplorerPlugin::OpenProjectResult result = ProjectExplorerPlugin::openProject(filePath);
+    OpenProjectResult result = ProjectExplorerPlugin::openProject(filePath);
     if (!result)
         ProjectExplorerPlugin::showOpenProjectError(result);
 
@@ -2273,7 +2273,7 @@ void ProjectExplorerPlugin::openProjectWelcomePage(const FilePath &filePath)
         showOpenProjectError(result);
 }
 
-ProjectExplorerPlugin::OpenProjectResult ProjectExplorerPlugin::openProject(const FilePath &filePath)
+OpenProjectResult ProjectExplorerPlugin::openProject(const FilePath &filePath)
 {
     OpenProjectResult result = openProjects({filePath});
     Project *project = result.project();
@@ -2323,7 +2323,7 @@ static void appendError(QString &errorString, const QString &error)
     errorString.append(error);
 }
 
-ProjectExplorerPlugin::OpenProjectResult ProjectExplorerPlugin::openProjects(const FilePaths &filePaths)
+OpenProjectResult ProjectExplorerPlugin::openProjects(const FilePaths &filePaths)
 {
     QList<Project*> openedPro;
     QList<Project *> alreadyOpen;
@@ -3198,8 +3198,7 @@ void ProjectExplorerPluginPrivate::clearRecentProjects()
 void ProjectExplorerPluginPrivate::openRecentProject(const FilePath &filePath)
 {
     if (!filePath.isEmpty()) {
-        ProjectExplorerPlugin::OpenProjectResult result
-                = ProjectExplorerPlugin::openProject(filePath);
+        OpenProjectResult result = ProjectExplorerPlugin::openProject(filePath);
         if (!result)
             ProjectExplorerPlugin::showOpenProjectError(result);
     }
diff --git a/src/plugins/projectexplorer/projectexplorer.h b/src/plugins/projectexplorer/projectexplorer.h
index ced2d4e0f09..c9b55143be6 100644
--- a/src/plugins/projectexplorer/projectexplorer.h
+++ b/src/plugins/projectexplorer/projectexplorer.h
@@ -43,6 +43,46 @@ class MiniProjectTargetSelector;
 using RecentProjectsEntry = QPair<Utils::FilePath, QString>;
 using RecentProjectsEntries = QList<RecentProjectsEntry>;
 
+class PROJECTEXPLORER_EXPORT OpenProjectResult
+{
+public:
+    OpenProjectResult(const QList<Project *> &projects, const QList<Project *> &alreadyOpen,
+                      const QString &errorMessage)
+        : m_projects(projects), m_alreadyOpen(alreadyOpen),
+          m_errorMessage(errorMessage)
+    { }
+
+    explicit operator bool() const
+    {
+        return m_errorMessage.isEmpty() && m_alreadyOpen.isEmpty();
+    }
+
+    Project *project() const
+    {
+        return m_projects.isEmpty() ? nullptr : m_projects.first();
+    }
+
+    QList<Project *> projects() const
+    {
+        return m_projects;
+    }
+
+    QString errorMessage() const
+    {
+        return m_errorMessage;
+    }
+
+    QList<Project *> alreadyOpen() const
+    {
+        return m_alreadyOpen;
+    }
+
+private:
+    QList<Project *> m_projects;
+    QList<Project *> m_alreadyOpen;
+    QString m_errorMessage;
+};
+
 class PROJECTEXPLORER_EXPORT ProjectExplorerPlugin : public ExtensionSystem::IPlugin
 {
     Q_OBJECT
@@ -56,45 +96,6 @@ public:
 
     static ProjectExplorerPlugin *instance();
 
-    class OpenProjectResult
-    {
-    public:
-        OpenProjectResult(const QList<Project *> &projects, const QList<Project *> &alreadyOpen,
-                          const QString &errorMessage)
-            : m_projects(projects), m_alreadyOpen(alreadyOpen),
-              m_errorMessage(errorMessage)
-        { }
-
-        explicit operator bool() const
-        {
-            return m_errorMessage.isEmpty() && m_alreadyOpen.isEmpty();
-        }
-
-        Project *project() const
-        {
-            return m_projects.isEmpty() ? nullptr : m_projects.first();
-        }
-
-        QList<Project *> projects() const
-        {
-            return m_projects;
-        }
-
-        QString errorMessage() const
-        {
-            return m_errorMessage;
-        }
-
-        QList<Project *> alreadyOpen() const
-        {
-            return m_alreadyOpen;
-        }
-    private:
-        QList<Project *> m_projects;
-        QList<Project *> m_alreadyOpen;
-        QString m_errorMessage;
-    };
-
     static OpenProjectResult openProject(const Utils::FilePath &filePath);
     static OpenProjectResult openProjects(const Utils::FilePaths &filePaths);
     static void showOpenProjectError(const OpenProjectResult &result);
diff --git a/src/plugins/projectexplorer/projectmanager.cpp b/src/plugins/projectexplorer/projectmanager.cpp
index 4943773f4b0..35335bde131 100644
--- a/src/plugins/projectexplorer/projectmanager.cpp
+++ b/src/plugins/projectexplorer/projectmanager.cpp
@@ -637,7 +637,7 @@ void ProjectManagerPrivate::restoreProjects(const FilePaths &fileList)
     // Keep projects that failed to load in the session!
     m_failedProjects = fileList;
     if (!fileList.isEmpty()) {
-        ProjectExplorerPlugin::OpenProjectResult result = ProjectExplorerPlugin::openProjects(fileList);
+        OpenProjectResult result = ProjectExplorerPlugin::openProjects(fileList);
         if (!result)
             ProjectExplorerPlugin::showOpenProjectError(result);
         const QList<Project *> projects = result.projects();
diff --git a/src/plugins/qmlprojectmanager/cmakegen/cmakeprojectconverter.cpp b/src/plugins/qmlprojectmanager/cmakegen/cmakeprojectconverter.cpp
index 21a538c7c51..da32379b029 100644
--- a/src/plugins/qmlprojectmanager/cmakegen/cmakeprojectconverter.cpp
+++ b/src/plugins/qmlprojectmanager/cmakegen/cmakeprojectconverter.cpp
@@ -114,7 +114,7 @@ bool CmakeProjectConverter::convertProject(const QmlProjectManager::QmlProject *
 
     if (retVal) {
         QMessageBox::information(Core::ICore::dialogParent(), SUCCESS_TITLE, SUCCESS_TEXT);
-        ProjectExplorer::ProjectExplorerPlugin::OpenProjectResult result
+        ProjectExplorer::OpenProjectResult result
                 = ProjectExplorer::ProjectExplorerPlugin::openProject(newProjectFile());
         if (!result)
             ProjectExplorer::ProjectExplorerPlugin::showOpenProjectError(result);
diff --git a/src/plugins/qtsupport/gettingstartedwelcomepage.cpp b/src/plugins/qtsupport/gettingstartedwelcomepage.cpp
index 7256afc050a..f5b5c0ac49f 100644
--- a/src/plugins/qtsupport/gettingstartedwelcomepage.cpp
+++ b/src/plugins/qtsupport/gettingstartedwelcomepage.cpp
@@ -203,7 +203,8 @@ static void openProject(const ExampleItem *item)
     // don't try to load help and files if loading the help request is being cancelled
     if (proFile.isEmpty())
         return;
-    ProjectExplorerPlugin::OpenProjectResult result = ProjectExplorerPlugin::openProject(proFile);
+
+    OpenProjectResult result = ProjectExplorerPlugin::openProject(proFile);
     if (result) {
         ICore::openFiles(filesToOpen);
         ModeManager::activateMode(Core::Constants::MODE_EDIT);
diff --git a/src/plugins/studiowelcome/studiowelcomeplugin.cpp b/src/plugins/studiowelcome/studiowelcomeplugin.cpp
index 5a494f5b4ef..b48d87121f8 100644
--- a/src/plugins/studiowelcome/studiowelcomeplugin.cpp
+++ b/src/plugins/studiowelcome/studiowelcomeplugin.cpp
@@ -252,7 +252,7 @@ public:
         const FilePath projectFile = FilePath::fromVariant(
             data(index(row, 0), ProjectModel::FilePathRole));
         if (projectFile.exists()) {
-            const ProjectExplorerPlugin::OpenProjectResult result
+            const OpenProjectResult result
                 = ProjectExplorer::ProjectExplorerPlugin::openProject(projectFile);
             if (!result && !result.alreadyOpen().isEmpty()) {
                 const auto fileToOpen = getMainUiFileWithFallback();