export declare abstract class Cache {
    abstract has(name: string): Promise<boolean>;
    abstract get<T>(name: string, defaultValue?: T | (() => T | Promise<T>)): Promise<T | undefined>;
    abstract remember<T>(name: string, defaultValue?: T | (() => T | Promise<T>), duration?: number): Promise<T | undefined>;
    abstract set(name: string, data: any, duration?: number): Promise<void>;
    abstract delete(name: string): Promise<void>;
    abstract flush(): Promise<void>;
}
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