[doc] hide private functions

src/application/resize.js

@@ -4,6 +4,7 @@ import * as device from "./../system/device";
  * scale the "displayed" canvas by the given scalar.
  * this will modify the size of canvas element directly.
  * Only use this if you are not using the automatic scaling feature.
+ * @private
  * @param {Application} game - the game application instance triggering the resize
  * @param {number} x - x scaling multiplier
  * @param {number} y - y scaling multiplier
@@ -35,6 +36,7 @@ function scale(game, x, y) {
 
 /**
  * callback for window resize event
+ * @private
  * @param {Application} game - the game application instance triggering the resize
  */
 export function onresize(game) {