Add static method

CMakeLists.txt

@@ -66,7 +66,7 @@ option(KDEPIM_RUN_AKONADI_TEST "Enable autotest based on Akonadi." TRUE)
 find_package(Qt5 ${QT_REQUIRED_VERSION} CONFIG REQUIRED DBus Network Test Widgets WebEngine WebEngineWidgets)
 set(LIBGRAVATAR_VERSION_LIB "5.12.40")
 set(MAILCOMMON_LIB_VERSION_LIB "5.12.46")
-set(KDEPIM_APPS_LIB_VERSION_LIB "5.12.40")
+set(KDEPIM_APPS_LIB_VERSION_LIB "5.12.41")
 set(MESSAGELIB_LIB_VERSION_LIB "5.12.62")
 set(LIBKLEO_LIB_VERSION_LIB "5.12.40")
 set(PIMCOMMON_LIB_VERSION_LIB "5.12.41")

src/undosend/undosendmanager.cpp

@@ -27,3 +27,9 @@ UndoSendManager::UndoSendManager(QObject *parent)
 UndoSendManager::~UndoSendManager()
 {
 }
+
+UndoSendManager *UndoSendManager::self()
+{
+    static UndoSendManager s_self;
+    return &s_self;
+}

src/undosend/undosendmanager.h

@@ -28,6 +28,7 @@ class UndoSendManager : public QObject
 public:
     explicit UndoSendManager(QObject *parent = nullptr);
     ~UndoSendManager();
+    static UndoSendManager *self();
 };
 
 #endif // UNDOSENDMANAGER_H