type PackageJson = {
    dependencies?: Record<string, string>;
    devDependencies?: Record<string, string>;
    [key: string]: unknown;
};
/**
 * Checks if a given package exists in dependencies or devDependencies of a package.json object.
 * @param packageJson The parsed package.json object.
 * @param packageName The name of the package to check.
 * @returns True if the package exists, false otherwise.
 */
export declare function hasPackage(packageJson: PackageJson, packageName: string): boolean;
export {};