String innerHtml

Source 

String get innerHtml {
  final container = new Element.tag("div");
  final SvgElement cloned = this.clone(true);
  container.children.addAll(cloned.children);
  return container.innerHtml;
}
void innerHtml=(String value)

Source 

set innerHtml(String value) {
  this.setInnerHtml(value);
}