pub type Extra = Map<String, Value>;Expand description
Free-form map used as a forward-compatibility safety net on the wire types
that model MockServer actions. Any JSON field the typed model does not yet
name is captured here (via #[serde(flatten)]) so it survives a
deserialize-then-serialize round-trip instead of being silently dropped.
An empty map contributes no keys when serialized, so a flattened Extra
is invisible on the wire unless the server actually sent unknown fields.
Aliased Typeยง
pub struct Extra { /* private fields */ }