example.rs

// Increment the version number every time the version changes. I can't figure out how to
// break this out into its own const, see https://github.com/rust-lang/rust/issues/52393.
#[derive(Debug, Serialize, Deserialize)]
#[serde(tag = "schema_version")]
enum VersionedCheckListList {
    #[serde(rename = "1")] // increment here
    Current(CheckListList),
}