/**
* Setup mainboard background and foreground sprite from remote resources
*/
setRemoteImageToMainboardSprites () {
   if (this.mainBoardBackgroundSprite) {
 RemoteResourceManager.getInstance().setRemoteImageToSprite(this.mainBoardBackgroundSprite,'mainboard_background');
}
if (this.mainBoardForegroundSprite) {
  RemoteResourceManager.getInstance().setRemoteImageToSprite(this.mainBoardForegroundSprite,'mainboard_foreground');
}