import { ServerResponse } from "http";
/**
 * Wraps a ServerResponse object to prevent setting the Content-Length header.
 */
export declare function preventContentLength(res: ServerResponse): void;
export declare function createWatcherLock(): {
    lock(): void;
    unlock(): void;
    waitUntilFree(): Promise<void>;
};
export declare const delay: (ms: number) => Promise<unknown>;
/**
 * This function waits until a file stabilizes, meaning its size does not change for a certain number of attempts
 * and the content ends with a specific expected tail.
 * It uses stream reading to check the file's content, the same wait serve-static uses.
 * This will help to prevent when serve-static serves a file that is still being written to.
 * One of the issues, related to this, is "Constructor for "embeddable-component#undefined" was not found", that we saw quite often in the past.
 * @param filePath
 * @param expectedTail
 * @param maxAttempts
 * @param stableCount
 */
export declare function waitUntilFileStable(filePath: string, expectedTail: string, { maxAttempts, requiredStableCount, }?: {
    maxAttempts?: number;
    requiredStableCount?: number;
}): Promise<void>;