type PackageName = string;
type PackageRange = string;
type PackageVersion = string;
export declare function preventPrototypePollution(): void;
type FreezeResult = {
    success: true;
} | {
    success: false;
    incompatiblePackages: Record<PackageName, PackageVersion>;
};
export declare function freezeBuiltinsIfPossible(incompatiblePackageVersions: Record<PackageName, PackageRange>): FreezeResult;
export {};