eachAfter method
Implementation
eachAfter(Function(BubbleNode) callback) {
BubbleNode node = this;
var nodes = [node];
var next = [];
while (nodes.isNotEmpty) {
node = nodes.removeLast();
next.add(node);
var children = node.children;
if (children != null) {
nodes.addAll(children);
}
}
while (next.isNotEmpty && (node = next.removeLast()) != null) {
callback(node);
}
}