/**
 * Helper utilities for TAP mapping.
 */
/**
 * Convert Headers-like object or Map to Record<string, string>.
 *
 * Handles:
 * - Headers (browser/node fetch API)
 * - Map<string, string>
 * - Record<string, string> (passthrough)
 *
 * @param headers - Headers-like object
 * @returns Record<string, string>
 */
export declare function headersToRecord(headers: {
    forEach: (callback: (value: string, key: string) => void) => void;
} | Record<string, string>): Record<string, string>;
/**
 * Get header value by name (case-insensitive).
 *
 * @param headers - Headers as Record
 * @param name - Header name
 * @returns Header value or empty string
 */
export declare function getHeader(headers: Record<string, string>, name: string): string;
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