import type { Directive } from './schemas.js';
/**
 * Converts a Feature-Policy directive to a string.
 *
 * @param {Directive} d
 */
export declare const featurePolicyDirectiveMapper: (d: Directive) => string;
/**
 * Converts a Permissions-Policy directive to a string.
 *
 * @param {Directive} d
 */
export declare const permissionsPolicyDirectiveMapper: (d: Directive) => string;
export declare const appendToHeadersFile: (headerKey: string, headerValue: string, headersFilepath: string, patterns: string[]) => void;
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