export type PackageOptions = {
    readonly indexLoophole: boolean;
    readonly filenameLoophole: boolean;
    readonly defaultImportability: "public" | "package" | "private";
    readonly treatSelfReferenceAs: "internal" | "external";
    readonly excludeSourcePatterns?: readonly string[];
    readonly packageDirectory?: readonly string[];
    readonly projectDirectory?: string;
};
/**
 * Checks whether importer is in the same 'package' as exporter.
 */
export declare function isInPackage(importer: string, exporter: string, packageOptions: PackageOptions): boolean;