如何使用Firebase的新bolt编译器定义索引

我正在使用新的螺栓编译器(在此处介绍:https://www.firebase.com/blog/2015-11-09-introducing-the-bolt-compiler.html)

我需要在我的类型Event的owner字段中定义一个索引:

type Event {
    description : String | Null,
    name : String,
    color : Number,
    owner : String,
    shared : Boolean
    index() = "owner";
}

当我尝试编译此代码时,我得到以下输出:

bolt: Generating rules.json...
bolt:1:1: Unsupported method name in type statement: 'index' (allowed: 'validate', 'read', 'write')

请帮忙:我该如何定义索引？我想我需要在路径声明中定义它们？

bolt编译器的文档在定义索引时并不多:https://github.com/firebase/bolt/blob/master/docs/language.md

刚刚找到答案:

path /users/$uid/events {
    index() = "owner";
}