Add ol.source.Vector#addFeatures

src/ol/source/vectorsource.exports

@@ -1,5 +1,6 @@
 @exportSymbol ol.source.Vector
 @exportProperty ol.source.Vector.prototype.addFeature
+@exportProperty ol.source.Vector.prototype.addFeatures
 @exportProperty ol.source.Vector.prototype.getClosestFeatureToCoordinate
 @exportProperty ol.source.Vector.prototype.forEachFeature
 @exportProperty ol.source.Vector.prototype.getAllFeatures

src/ol/source/vectorsource.js

@@ -102,6 +102,14 @@ ol.source.Vector.prototype.addFeatureInternal = function(feature) {
   }
   this.dispatchEvent(
       new ol.source.VectorEvent(ol.source.VectorEventType.ADDFEATURE, feature));
+};
+
+
+/**
+ * @param {Array.<ol.Feature>} features Features.
+ */
+ol.source.Vector.prototype.addFeatures = function(features) {
+  this.addFeaturesInternal(features);
   this.dispatchChangeEvent();
 };