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));
}