Add a takeLayer method

python/core/qgsvirtuallayertask.sip.in

@@ -34,6 +34,11 @@ Constructor.
     QgsVectorLayer *layer();
 %Docstring
 Returns the underlying virtual layer.
+%End
+
+    QgsVectorLayer *takeLayer();
+%Docstring
+Returns the underlying virtual layer and ownership.
 %End
 
     QgsVirtualLayerDefinition definition() const;

src/core/qgsvirtuallayertask.cpp

@@ -52,6 +52,11 @@ QgsVectorLayer *QgsVirtualLayerTask::layer()
   return mLayer.get();
 }
 
+QgsVectorLayer *QgsVirtualLayerTask::takeLayer()
+{
+  return mLayer.release();
+}
+
 void QgsVirtualLayerTask::cancel()
 {
   mLayer->dataProvider()->cancel();

src/core/qgsvirtuallayertask.h

@@ -47,6 +47,11 @@ class CORE_EXPORT QgsVirtualLayerTask : public QgsTask
      */
     QgsVectorLayer *layer();
 
+    /**
+     * Returns the underlying virtual layer and ownership.
+     */
+    QgsVectorLayer *takeLayer();
+
     /**
      * Returns the virtual layer definition.
      */