export declare const delay: (value: any, ms?: number) => Promise<unknown>;
export declare const $asyncEcho: {
    sync: null;
    async: (context: any, value: any) => Promise<unknown>;
};
export declare const _prepareEvaluateTestCases: (interpreterSpecs: any) => {
    (cases: any): void;
    testSyncCases: (cases: any) => void;
    testAsyncCases: (cases: any) => void;
};