Very early KDE 6 release.

plasma/plasmoids/io.gitgud.wackyideas.win7showdesktop/contents/ui/lib/ConfigPage.qml

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+// Version 4
+
+import QtQuick 2.15
+import QtQuick.Layouts 1.3
+
+import org.kde.kcmutils as KCM
+
+KCM.SimpleKCM {
+	id: page
+	Layout.fillWidth: true
+	default property alias _contentChildren: content.data
+	implicitHeight: content.implicitHeight
+
+	ColumnLayout {
+		id: content
+		anchors.left: parent.left
+		anchors.right: parent.right
+		anchors.top: parent.top
+
+		// Workaround for crash when using default on a Layout.
+		// https://bugreports.qt.io/browse/QTBUG-52490
+		// Still affecting Qt 5.7.0
+		Component.onDestruction: {
+			while (children.length > 0) {
+				children[children.length - 1].parent = page
+			}
+		}
+	}
+
+	property alias showAppletVersion: appletVersionLoader.active
+	Loader {
+		id: appletVersionLoader
+		active: false
+		visible: active
+		source: "AppletVersion.qml"
+		anchors.right: parent.right
+		anchors.bottom: parent.top
+	}
+}