void setInnerHtml(String html, { NodeValidator validator, NodeTreeSanitizer treeSanitizer })

Source 

void setInnerHtml(String html,
    {NodeValidator validator, NodeTreeSanitizer treeSanitizer}) {
  this.nodes.clear();
  append(document.body.createFragment(html,
      validator: validator, treeSanitizer: treeSanitizer));
}