export interface SynchronousWriteCache<T> {
    set: (key: string, value: T | null) => void;
    delete: (key: string) => void;
    deleteMany: (keys: string[]) => void;
    clear: () => void;
}
export type GetManyResult<T> = {
    resolvedValues: T[];
    unresolvedKeys: string[];
};
export interface SynchronousCache<LoadedValue> extends SynchronousWriteCache<LoadedValue> {
    readonly ttlLeftBeforeRefreshInMsecs?: number;
    get: (key: string) => LoadedValue | undefined | null;
    getMany: (keys: string[]) => GetManyResult<LoadedValue>;
    getExpirationTime: (key: string) => number | undefined;
}
export interface SynchronousWriteGroupCache<T> {
    setForGroup: (key: string, value: T | null, group: string) => void;
    deleteFromGroup: (key: string, group: string) => void;
    deleteGroup: (group: string) => void;
    clear: () => void;
}
export interface SynchronousGroupCache<T> extends SynchronousWriteGroupCache<T> {
    readonly ttlLeftBeforeRefreshInMsecs?: number;
    getFromGroup: (key: string, group: string) => T | undefined | null;
    getManyFromGroup: (keys: string[], group: string) => GetManyResult<T>;
    getExpirationTimeFromGroup: (key: string, group: string) => number | undefined;
}