Correct types in ol.layer.Group

2013-12-13 19:16:31 +01:00
parent e96d56215b
commit ee2098743d
2 changed files with 10 additions and 5 deletions
@@ -621,11 +621,16 @@ goog.exportProperty(

 /**
 * Get the collection of layers associated with this map.
- * @return {ol.Collection} Layers.
+ * @return {ol.Collection|undefined} Layers.
 * @todo stability experimental
 */
 ol.Map.prototype.getLayers = function() {
-  return this.getLayerGroup().getLayers();
+  var layerGroup = this.getLayerGroup();
+  if (goog.isDef(layerGroup)) {
+    return layerGroup.getLayers();
+  } else {
+    return undefined;
+  }
 };