Allow tileLoadFunction override for ol.source.WMTS

src/objectliterals.jsdoc

@@ -640,6 +640,8 @@
  * @property {Object|undefined} dimensions Dimensions.
  * @property {string|undefined} url URL.
  * @property {number|undefined} maxZoom Maximum zoom.
+ * @property {ol.TileLoadFunctionType|undefined} tileLoadFunction Optional
+ *     function to load a tile given a URL.
  * @property {Array.<string>|undefined} urls Urls.
  */
 

src/ol/source/wmtssource.js

@@ -179,6 +179,7 @@ ol.source.WMTS = function(options) {
     extent: options.extent,
     projection: options.projection,
     tileGrid: tileGrid,
+    tileLoadFunction: options.tileLoadFunction,
     tileUrlFunction: tileUrlFunction
   });