close() {
    if (this.style_ != shakaDemo.InputContainer.Style.ACCORDION) {
      return;
    }
    this.table_.classList.remove('show');
    this.table_.addEventListener('transitionend', (e) => {
      this.table_.classList.add('hidden');
    }, {once: true});
    this.header_.classList.remove('mdl-button--colored');
  }
If this is an accordion menu, close it.