withDelay method
Implementation
TweenSet withDelay(ChartTween tween, Duration delay) {
_TweenNode node = _TweenNode(tween, delay);
if (_currentNode == null) {
_currentNode = node;
} else {
node.parent = _currentNode!.parent;
_currentNode!.siblingList.add(node);
}
_nodeList.add(node);
return this;
}