Interface CollectionConfig<T>

interface CollectionConfig<T> {
    id: string;
    keyField?: T extends object
        ? | Extract<keyof T, string>
        | `${Extract<keyof T, string>}.${NonNullable<T[Extract<keyof T, string>]> extends object
            ?
                | Extract<keyof NonNullable<T[Extract<(...), (...)>]>, string>
                | `${Extract<keyof NonNullable<(...)[(...)]>, string>}.${NonNullable<
                    NonNullable<(...)>[Extract<(...), (...)>],
                > extends object
                    ?
                        | Extract<keyof (...), string>
                        | `${Extract<(...), (...)>}.${Extract<(...), (...)>}`
                    : never}`
            : never}`
        : never;
    keyOf: (doc: T) => string;
    queryService?: QueryService<T>;
    querySubscriptionService?: QuerySubscriptionService<T>;
    source: SourceAdapter<T>;
}