code: function _buildWordsContainer() {
          let container = document.createElement('div');
          container.className = 'ac__container';
          container.style.width = this._input.offsetWidth;
          container.style.position = 'relative';
          this._input.parentNode.insertBefore(container, this._input.nextSibling);
          let inner = document.createElement('div');
          inner.className = 'ac__inner';
          inner.style.position = 'absolute';
          inner.style.top = 0;
          inner.style.left = 0;
          inner.style.width = '100%';
          container.appendChild(inner);
          this._container = inner;
      }
docs: ---------------------------------------------// -------------- PRIVATE METHODS --------------// ---------------------------------------------// 
  Create a ui widget consisting of a parent and child div placed below the search input
  as a container to the list of words