rename of method to better show responsibility

frontend-js/src/main/js/map/CustomMap.js

@@ -130,11 +130,7 @@ CustomMap.prototype.clearOverlays = function() {
   for ( var overlayName in this.overlayCollections) {
     if (this.overlayCollections.hasOwnProperty(overlayName)) {
       var collection = this.overlayCollections[overlayName];
-      if (collection.constructor.name === "OverlayCollection") {
-        this.clearOverlayCollection(collection);
-      } else {
-        collection.clear();
-      }
+      collection.clear();
     }
   }
 };
@@ -145,7 +141,7 @@ CustomMap.prototype.clearOverlays = function() {
  * @param collection
  *          {@link OverlayCollection} from which all markers should be removed
  */
-CustomMap.prototype.clearOverlayCollection = function(collection) {
+CustomMap.prototype.hideMarkersForOverlayCollection = function(collection) {
   logger.debug("Clear collection: " + collection.name);
   for ( var aliasKey in collection.aliasMarkers) {
     if (collection.aliasMarkers.hasOwnProperty(aliasKey) && collection.aliasMarkers[aliasKey] !== undefined
@@ -183,7 +179,7 @@ CustomMap.prototype.clearOverlayCollection = function(collection) {
  *          after update, <code>false</code> otherwise
  */
 CustomMap.prototype.updateOverlayCollection = function(overlayCollection, fitBounds) {
-  this.clearOverlayCollection(overlayCollection);
+  this.hideMarkersForOverlayCollection(overlayCollection);
   return this.renderOverlayCollection({
     overlayCollection : overlayCollection,
     fitBounds : fitBounds
@@ -307,7 +303,7 @@ CustomMap.prototype.refreshComments = function() {
 
   var collection = self.getOverlayByName("comment");
   if (collection !== undefined) {
-    self.clearOverlayCollection(collection);
+    self.hideMarkersForOverlayCollection(collection);
     if (ServerConnector.getSessionData(self.getProject()).getShowComments()) {
       return collection.refresh().then(function() {
         return self.renderOverlayCollection({