docs: function (height, width) {
          if (u.hasClass(this.element, 'u-menu-unaligned')) {
              // Do not clip.
              this.element.style.clip = '';
          } else if (u.hasClass(this.element, 'u-menu-bottom-right')) {
              // Clip to the top right corner of the menu.
              this.element.style.clip =
                  'rect(0 ' + width + 'px ' + '0 ' + width + 'px)';
          } else if (u.hasClass(this.element, 'u-menu-top-left')) {
              // Clip to the bottom left corner of the menu.
              this.element.style.clip =
                  'rect(' + height + 'px 0 ' + height + 'px 0)';
          } else if (u.hasClass(this.element, 'u-menu-top-right')) {
              // Clip to the bottom right corner of the menu.
              this.element.style.clip = 'rect(' + height + 'px ' + width + 'px ' +
                  height + 'px ' + width + 'px)';
          } else {
              // Default: do not clip (same as clipping to the top left corner).
              this.element.style.clip = 'rect(' + 0 + 'px ' + 0 + 'px ' +
                  0 + 'px ' + 0 + 'px)';
          }
      }