Stone.js API
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    The shape this module needs from a cache store, for deduplication only.

    interface CacheLike {
        add: <T>(
            key: string,
            value: T,
            options?: Record<string, unknown>,
        ) => Promise<boolean>;
    }
    Index
    add: <T>(
        key: string,
        value: T,
        options?: Record<string, unknown>,
    ) => Promise<boolean>