willAttachRenderer method
The renderObject will be / has been insert into parent. You can apply properties to renderObject.
This method should not do anything to update the children of the render object.
Implementation
@override
void willAttachRenderer() {
super.willAttachRenderer();
_animationRenderObject = _createFlareRenderObject();
if (_animationRenderObject != null) {
addChild(_animationRenderObject!);
}
}