code: function (isDefault) {
      var attrValue = isDefault ? this.data : this.attrValue;
      if (attrValue === null || attrValue === undefined) { return; }
      window.HTMLElement.prototype.setAttribute.call(this.el, this.attrName,
                                                     this.stringify(attrValue));
    }
docs: Write cached attribute data to the entity DOM element.
  
  @param {boolean} isDefault - Whether component is a default component. Always flush for
  default components.