Override ol.layer.Vector#getSource() (#11703)

Reference: http://openlayers.org/en/latest/apidoc/ol.layer.Vector.html

openlayers/openlayers.d.ts

@@ -6360,6 +6360,13 @@ declare module ol {
              */
             constructor(opt_options?: olx.layer.VectorOptions);
 
+            /**
+             * Return the associated {@link ol.source.Vector vectorsource} of the layer.
+             * @return {ol.source.Vector} Source.
+             * @api stable
+             */
+            getSource(): ol.source.Vector;
+       
             /**
              * Get the style for features.  This returns whatever was passed to the `style`
              * option at construction or to the `setStyle` method.