Better typing

src/ol/renderer/canvas/canvasimagelayerrenderer.js

@@ -55,6 +55,7 @@ ol.renderer.canvas.ImageLayer.prototype.forEachFeatureAtPixel =
   return source.forEachFeatureAtPixel(extent, resolution, rotation, coordinate,
       /**
        * @param {ol.Feature} feature Feature.
+       * @return {?} Callback result.
        */
       function(feature) {
         return callback.call(opt_obj, feature, this);

src/ol/renderer/canvas/canvasvectorlayerrenderer.js

@@ -104,6 +104,7 @@ ol.renderer.canvas.VectorLayer.prototype.forEachFeatureAtPixel =
         /**
          * @param {ol.geom.Geometry} geometry Geometry.
          * @param {Object} data Data.
+         * @return {?} Callback result.
          */
         function(geometry, data) {
           var feature = /** @type {ol.Feature} */ (data);

src/ol/renderer/dom/domimagelayerrenderer.js

@@ -60,6 +60,7 @@ ol.renderer.dom.ImageLayer.prototype.forEachFeatureAtPixel =
   return source.forEachFeatureAtPixel(extent, resolution, rotation, coordinate,
       /**
        * @param {ol.Feature} feature Feature.
+       * @return {?} Callback result.
        */
       function(feature) {
         return callback.call(opt_obj, feature, this);

src/ol/renderer/webgl/webglimagelayerrenderer.js

@@ -86,6 +86,7 @@ ol.renderer.webgl.ImageLayer.prototype.forEachFeatureAtPixel =
   return source.forEachFeatureAtPixel(extent, resolution, rotation, coordinate,
       /**
        * @param {ol.Feature} feature Feature.
+       * @return {?} Callback result.
        */
       function(feature) {
         return callback.call(opt_obj, feature, this);

src/ol/source/imagevectorsource.js

@@ -160,6 +160,7 @@ ol.source.ImageVector.prototype.forEachFeatureAtPixel =
         /**
          * @param {ol.geom.Geometry} geometry Geometry.
          * @param {Object} data Data.
+         * @return {?} Callback result.
          */
         function(geometry, data) {
           var feature = /** @type {ol.Feature} */ (data);