import type { EnvUsage, ScanOptions } from '../../config/types.js';
/**
 * Scans a file for environment variable usage.
 * @param filePath - The path to the file being scanned.
 * @param content - The content of the file.
 * @param opts - The scan options.
 * @returns An array of environment variable usages found in the file.
 */
export declare function scanFile(filePath: string, content: string, opts: ScanOptions): EnvUsage[];
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