在DatabaseReference.updateChildren()调用中设置优先级？

DatabaseReference ref = FirebaseDatabase.getInstance().getReference();
Map<String, Object> updates = new HashMap<>();
updates.put("path/to/node", "value");
updates.put("path/to/node/$priority", 10);
ref.updateChildren(updates);

DatabaseReference ref = FirebaseDatabase.getInstance().getReference("path/to/nodes");
Query query = ref.orderByPriority();
query.addValueEventListener(new ValueEventListener() {
    @Override
    public void onDataChange(DataSnapshot dataSnapshot) {
        for (DataSnapshot snapshot : dataSnapshot.getChildren()) {
            // 遍历按优先级排序的节点
        }
    }

    @Override
    public void onCancelled(DatabaseError databaseError) {
        // 处理取消事件
    }
});