use *;
/// A serializable bag of preserved state entries.
///
/// Each entry is a `(key, value)` string pair. The
/// caller is responsible for serializing non-string
/// values (numbers, booleans, etc.) to strings before
/// insertion.
///
/// # Wire format
///
/// ```json
/// {"entries": {"k1": "v1", "k2": "v2"}}
/// ```