code: function() {
      for (var i = this.notSelfClosingTags.length - 1; i >= 0; i--) {
        if (this.tagName == this.notSelfClosingTags[i]) return false;
      }
  
      return true;
    }
docs: Returns true if this tag should close itself (e.g. no </tag> element)
  @return {Boolean} True if this tag should close itself