/**
 * Enhanced read File (Synchronous).
 *
 * @param path - file path
 * @returns file content
 * @example
 * ```typescript
 * const fileContent = readFileSync('./file.txt', sync);
 * ```
 */
export declare function readFileSync(path: string): string;
/**
 * Enhanced read File (Asynchronous).
 *
 * - If writing queue is running for target path, it will wait for it to finish.
 *
 * @param path - file path
 * @returns file content
 * @example
 * ```typescript
 * const fileContent = await readFile('./file.txt', sync);
 * ```
 */
export declare function readFile(path: string): Promise<string>;
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