use std::borrow::Cow;use serde::{Deserialize, Serialize};pub mod changes;pub mod copy;pub mod get;pub mod query;pub mod query_changes;pub mod set;/// A (preferably short) string representing the state on the server/// for *all* the data of this type in the account (not just the/// objects returned in this call). If the data changes, this string/// MUST change. If the Foo data is unchanged, servers SHOULD return/// the same state string on subsequent requests for this data type./// When a client receives a response with a different state string to/// a previous call, it MUST either throw away all currently cached/// objects for the type or call "Foo/changes" to get the exact/// changes.#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]pub struct ObjectState<'a>(#[serde(borrow)] Cow<'a, str>);