type TypeMap = {
    [key: string]: string[];
};
declare class Mime {
    #private;
    constructor(...args: TypeMap[]);
    /**
     * Define mimetype -> extension mappings.  Each key is a mime-type that maps
     * to an array of extensions associated with the type.  The first extension is
     * used as the default extension for the type.
     *
     * e.g. mime.define({'audio/ogg', ['oga', 'ogg', 'spx']});
     *
     * If a mapping for an extension has already been defined an error will be
     * thrown unless the `force` argument is set to `true`.
     *
     * e.g. mime.define({'audio/wav', ['wav']}, {'audio/x-wav', ['*wav']});
     */
    define(typeMap: TypeMap, force?: boolean): this;
    /**
     * Get mime type associated with an extension
     */
    getType(path: string): string | null;
    /**
     * Get default file extension associated with a mime type
     */
    getExtension(type: string): string | null;
    _freeze(): this;
}
export declare const mime: Mime;
export {};