didInsertNode method
Implementation
void didInsertNode(List<Node> targets, Node? next) {
  Node? unchangedPrevious = targets.isNotEmpty ? targets[0].previousSibling : null;
  for (final targetNode in targets) {
    childrenChanged(ChildrenChange.forInsertion(targetNode, unchangedPrevious, next, ChildrenChangeSource.API));
  }
}