Псевдоним типа IMapDidChange<K, V>

IMapDidChange:
    | {
        name: K;
        newValue: V;
        object: ObservableMap<K, V>;
        oldValue: V;
        type: "update";
    }
    | { name: K; newValue: V; object: ObservableMap<K, V>; type: "add" }
    | { name: K; object: ObservableMap<K, V>; oldValue: V; type: "delete" }