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/** * ICacheAdapter is the interface to be implemented by Cache Adapters for them to be usable with Harmony. * * Methods can return Promises too. */export interface ICacheAdapter {  /** Gets a key from a Cache */  get: <T>(    cacheName: string,    key: string  ) => Promise<T | undefined> | T | undefined  /** Sets a key to value in a Cache Name with optional expire value in MS */  set: <T>(    cacheName: string,    key: string,    value: T,    expire?: number  ) => Promise<void> | void  /** Deletes a key from a Cache */  delete: (cacheName: string, ...keys: string[]) => Promise<boolean> | boolean  /** Gets array of all values in a Cache */  array: <T>(cacheName: string) => undefined | T[] | Promise<T[] | undefined>  /** Entirely deletes a Cache */  deleteCache: (cacheName: string) => boolean | Promise<boolean>  /** Get size (length) of entries in a Cache */  size: <T>(    cacheName: string,    filter?: (payload: T) => boolean  ) => number | undefined | Promise<number | undefined>  /** Gets all keys of the Cache */  keys: (    cacheName: string  ) => string[] | undefined | Promise<string[] | undefined>}