export declare class TSConfigUpgrader {
    private filePath;
    private fileWriter;
    private messages;
    /**
     * the constructor.
     * @param filePath the file path.
     * @param fileName the file name.
     */
    constructor(filePath: string, fileName?: string);
    /**
     * the run function to resolve the errors for base config.
     */
    runBase(): Promise<void>;
    /**
     * the run function to resolve the errors.
     */
    run(): Promise<void>;
}