/**
 * Utility function for unloading the raw contents of a DBC file into a string that can
 * then be passed to the .load function provided by the Dbc class.
 *
 * @param file File to unload
 * @param onLoad Optional callback function that can be provided that will be called after
 * file has been loaded. Function is provided the raw contents of the file so that it can be used
 * in the callback
 */
export declare const dbcReader: (file: File, onLoad?: ((content: string) => void) | undefined) => void;