addClientAdContainer_() {
    /** @private {HTMLElement} */
    this.clientAdContainer_ = shaka.util.Dom.createHTMLElement('div');
    this.clientAdContainer_.classList.add('shaka-client-side-ad-container');
    shaka.ui.Utils.setDisplay(this.clientAdContainer_, false);
    this.eventManager_.listen(this.clientAdContainer_, 'click', () => {
      this.onContainerClick();
    });
    this.videoContainer_.appendChild(this.clientAdContainer_);
  }
Adds a container for client side ad UI with IMA SDK.

@private