export declare const DEFAULT_LANGUAGE_MAPPER: {
    readonly ecmascript: "js";
    readonly javascript: "js";
    readonly javascriptreact: "jsx";
    readonly typescript: "ts";
    readonly typescriptreact: "tsx";
    readonly markdown: "md";
    readonly markdownjsx: "mdx";
    readonly markdownreact: "mdx";
    readonly mdown: "md";
    readonly mkdn: "md";
};
export declare function getShortLang(filename: string, languageMapper?: Record<string, string> | false): string;