code: function(e) {
      if (!e || e.tagName.toLowerCase() === 'svg')
        return;
  
      // Remove `style` and deprecated presentational attributes
      for (var i = 0; i < this.PRESENTATIONAL_ATTRIBUTES.length; i++) {
        e.removeAttribute(this.PRESENTATIONAL_ATTRIBUTES[i]);
      }
  
      if (this.DEPRECATED_SIZE_ATTRIBUTE_ELEMS.indexOf(e.tagName) !== -1) {
        e.removeAttribute('width');
        e.removeAttribute('height');
      }
  
      var cur = e.firstElementChild;
      while (cur !== null) {
        this._cleanStyles(cur);
        cur = cur.nextElementSibling;
      }
    }
docs: Remove the style attribute on every e and under.
  TODO: Test if getElementsByTagName(*) is faster.
  
  @param Element
  @return void