getTemplate method to get the Mustache template from the TileJSON

src/ol/source/tileutfgridsource.js

@@ -51,6 +51,12 @@ ol.source.TileUTFGrid = function(options) {
    */
   this.tileCache = new ol.TileCache();
 
+  /**
+   * @private
+   * @type {string|undefined}
+   */
+  this.template_ = undefined;
+
   var request = new goog.net.Jsonp(options.url);
   request.send(undefined, goog.bind(this.handleTileJSONResponse, this));
 };
@@ -73,6 +79,15 @@ ol.source.TileUTFGrid.prototype.expireCache = function(usedTiles) {
 };
 
 
+/**
+ * @return {string|undefined} The template from TileJSON.
+ * @api
+ */
+ol.source.TileUTFGrid.prototype.getTemplate = function() {
+  return this.template_;
+};
+
+
 /**
  * @param {ol.Coordinate} coordinate Coordinate.
  * @param {number} resolution Resolution.
@@ -123,6 +138,8 @@ ol.source.TileUTFGrid.prototype.handleTileJSONResponse = function(tileJSON) {
   });
   this.tileGrid = tileGrid;
 
+  this.template_ = tileJSON.template;
+
   var grids = tileJSON.grids;
   if (!goog.isDefAndNotNull(grids)) {
     this.setState(ol.source.State.ERROR);