GroupNode
Group nodes together to transform them as a single unit.
Example
const group = engine.nodes.addGroup({ x: 100, y: 100 });
const g = group.getNode();
const c = engine.nodes.addCircle({ x: 0, y: 0, radius: 40, fill: '#22c55e' });
const t = engine.nodes.addText({ x: 60, y: -10, text: 'Group', fontSize: 20, fill: '#fff' });
g.add(c.getNode());
g.add(t.getNode());