add method

@override void add(Node child)

Add a child node.

Implementation

@override
void add(Node child) {
  if (child._parent != null) {
    throw Exception('Child already has a parent');
  }
  children.add(child);
  child._parent = this;
  child._markWorldTransformDirty();
  final renderScene = _renderScene;
  if (renderScene != null) {
    child._mount(renderScene);
  }
  markBoundsDirty();
}