/**
 * Extract the fragment that has been rendered to HTML. Extracting
 * is a process of best-guessing. A fragment's parents get ids of the form "FRAGMENT_PARENT_ID__##"
 * with lower numbers indicating the element is closer to the root of the fragment. This script searches
 * for the portion of the tree with an is with the lowest number and returns the children of that
 * fragment.
 * @param source
 */
export declare function extractFragmentFromHtml(source: string, options?: {
    prettyPrint?: boolean;
}): Promise<string>;
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