ult();
        }
      },

      _lockScrollInteractions: function() {
        // Memoize body inline styles:
        this._originalBodyStyles.overflow = document.body.style.overflow;
        this._originalBodyStyles.overflowX = document.body.style.overflowX;
        this._originalBodyStyles.overflowY = document.body.style.overflowY;

        // Disable overflow scrolling on body:
        // TODO(cdata): It is technically not sufficient to hide overflow on
        // body alone. A better solution might be t