如何从集合中删除节点？
例如，我想velociraptor从dinos集合中删除。但是当我运行脚本时，我仍然看到执行dinos后有两个节点dinos.map().val(cb)。
const Gun = require('gun');
const gun = new Gun({ peers: [ 'https://localhost:8888/gun' ] });
const app = gun.get('park');
const dinos = app.get('dinos');
const velociraptor = app.get('velociraptor').put({
statistics: {
force: 9,
speed: 15
}
});
const trex = app.get('trex').put({
statistics: {
force: 25,
speed: 5
}
});
dinos.set(velociraptor);
dinos.set(trex);
//velociraptor.put(null);
app.get('velociraptor').put(null);
dinos.map().val((v, k) => {
console.log(k);
console.log(v);
});