export declare class DataCache {
    protected cache: Record<string, any>;
    get(key: string): Promise<any>;
    push(key: string, value: any): Promise<void>;
    put(key: string, value: any): Promise<void>;
    pop(key: string): Promise<any>;
    filter(filter: string | RegExp): Promise<any[]>;
    purge(key?: string): Promise<void>;
}