/**
 * Tests an optimized selector and returns the element reference and duration.
 */
export declare function testOptimizedSelector(browser: WebdriverIO.Browser | WebdriverIO.MultiRemoteBrowser, using: string, value: string, isMultiple: boolean, debug?: boolean): Promise<{
    elementRefs: Array<{
        [key: string]: string;
    }>;
    duration: number;
} | null>;
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